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Radius Mini-ALTO windshield

January 21, 2025

Introduction

Radius Windshields have only been around since February 2023, but, of course, the team embodies years of experience from former Rycote days, so the development of the first full basket windshield from the company has generated a lot of interest. This interest has been stimulated by the refreshingly open approach to development of their products, especially via social media, with plenty of behind-the-scenes photos and videos, not least showing the novel use of ultrasonic welding to fix the fabric to the basket. The long development of the first basket windshield – the Mini-ALTO – saw pre-production models being packed up on Christmas Eve, to be sent off to UK field testers, and I received mine a few days later. In his covering letter, Simon Davies asked for ‘no filters on your opinion please’ and has no qualms about these opinions being public, so here goes!

First off, it is important to stress that the Mini-ALTO is just that: mini. The pre-production model I have been sent (the baby of the range: the 115) is the smallest full basket windshield that I have used, and so, of course, there are limits to what size mics can fit in it (obviously longer mics can fit in the 180 and 210 models, and the planned 260 model). Equally there are limits as to what such a small basket can offer in terms of wind reduction, and Radius are clear about this: their planned larger models, the ALTO and the CIRRUS will offer better wind reduction. Now Radius will have their own view on the market place for such a dinky windshield, but here I will be testing it from my own perspective, comparing it to realistic alternatives: above all, this will include the small Rycote Nano Shield NS1-BA, which is what I have used previously when I need an ultra-compact windshield, and which has long left my Rycote Baby Ball Gags largely redundant. Others may wish to compare it to the Cinela COSI models, and let’s hope so: I don’t have one to hand! Anyway, enough of a preamble: let’s get stuck in…

Design, construction and operation

Above all, the Mini-ALTO has been designed with ‘speed of transition between interior and exterior set up’. To achieve this, the basket follows the pattern of the Rycote Cyclone and Nano Shield in using magnets to hold the two halves together, except here the magnets are much stronger and do not need the assistance of physical latches: a couple of silicone safety straps on the sides can be used if required, but these seem entirely superfluous to any use I can imagine and can be removed (and lost!) easily. In fact the magnets are so strong that I had to refer to the instructions when opening the basket the first time: I didn’t want to break the windshield within the first five minutes. Once you know that the magnets are all that hold the Mini-ALTO together, opening is a breeze. What is also nice is that the magnets are properly embedded, and cannot be pulled out: I have had several come out on my Nano Shields over the years.

Mini-ALTO 115 with the front pod removed, showing the magnets that hold the two halves together, the slot into which the pods slide, and the cable gland. The mic clips are the RAD 19/20mm clips, which – amongst other options (inc. DIY) – can be swapped with the universal clips supplied.

Inside the basket the Mini-ALTO utilizes the RAD-2 mount, released in 2023, which will be familiar to many. This doesn’t connect to the basket directly, but does so via an adapter, which Radius call the ‘Smiley Face’. Perhaps I need to drink more cider to see the piece of plastic in that light, but it is well made and, more to the point, its wide channel accepts the two halves of the basket really easily: the basket halves slide into place smoothly and with a positive clunk. That’s a refreshing and distinct difference from the frequent fumbling with the Nano Shield basket, and by far the easiest (dis)assembly of a windshield basket I have come across. When the adapter is not in place (i.e. when the basket isn’t in use) it can be replaced with the supplied small ‘windshield stowage holder’: this has a carabiner attached so you can dangle the basket off your body or bag until you need to pop it back on. The adapter has two other functions beyond holding the basket to the shock-mount: it provides an exit point for the cable and holds the shock-mount hoops (Radius’s equivalents to Rycote’s lyres and Cinela’s elliptical isolators). Looking at the cable exit first, the test model is provided with a rubbery gland to fit thin cables, but there is no other cable management inside the basket: the user is urged to utilize the straps on the mic clips or the short cable straps supplied to run the cable along the mic. I’m no fan of clunky and unshielded conn boxes in windshields, but I quite like the neat little clip on the rear of the rail of a Nano Shield. Of course, the cable cleats and the XLR holder on the RAD-2 mount should mean that cable-borne noise isn’t an issue. Turning to the shock-mount hoops, for me, and I suspect others, these are one of the small but most useful features of the Radius Windshields approach: their modular nature (whereby hoops and mic clips are screwed together and can be changed) is a significant departure from the Rycote lyres, where the mic clips are integrated. Above all, this means that the hoops and, by extension, the Mini-ALTO can be adapted for a mid-side (MS) pair. Radius have an MS clip in development for release shortly, with which I have had some input, but in the meantime I am using my own similar 3d-printed clips. It is such a pleasure to get away from clunky back-to-back clips and to be able to get the two mics closely spaced. I have posted previously about how the hoops lend themselves to such customization, and here’s a couple of examples of how this now translates to the diminutive Mini-ALTO:

That flexibility of the Radius hoops, which allows MS clips to fit the shock-mounts directly (no more back-to-back clips!), is now carried over to the Mini-ALTO.
This might be taking it too far, but with some MKH 8000 mics and MZL connectors, the Mini-ALTO 115 can even house a double mid-side (DMS) rig: those Radius hoops are just so adaptable!

Turning to the design of the basket, the fabric looks reassuringly transparent compared to, say, the thicker 3d tex material of the Cyclone and Nano Shield. The basket itself, though, looks less transparent on purely visual grounds: there is something of a price to pay for the slick assembly/disassembly in the resultant 21mm-wide plastic ring formed when the two half-baskets are fitted (the slight chunkiness is necessary to house the magnets securely). And each end cap joins the cylindrical part of the basket with another ring: 9.5mm wide externally, but 12.5mm wide internally. Such H-rings for end caps are a feature of most cylindrical windshields, although not, of course, in the case of the Nano Shield. I am probably a bit more focused than most on the potential impact of plastic rings around windshields given my preference for MS pairs in the field, and the potential for impact on the sideways facing lobes of the fig 8 mic in particular, but at least in this case the fig 8 mic capsule naturally sits between the central ring and that of the front end cap. The mesh of the Mini-ALTO basket is formed by plastic 3.3mm wide, with mesh cells a lot smaller than the more open Nano Shield or Cyclone, but much larger than more traditional windshields such as the Rycote Modular. We will have to see, or hear, how the design of the basket affects sound (see below), but there is no denying that it is well engineered, robust and, above all, very easy to disassemble and assemble.

Turning to the size of the Mini-ALTO 115, the numerical suffix of the model derives from the 115mm length of the cylindrical section, with the end caps giving it an overall length of 198mm. This compares to the overall length of 225mm for the Nano Shield NS1-BA. The Mini-ALTO 115 weighs almost the same as this Nano Shield model: using the same cable for both, I weighed them in at 275g and 267g respectively.

The Mini-ALTO 115 (bottom in both photos) and the Nano Shield NS1-BA (top in both photos: don’t be confused that it too is wearing a Radius fur!).

Interestingly, Radius have a choice of furs for their new windshield. The initial plan, I understand from Simon Davies, was to sell the Mini-ALTO with the black fur, likely – given it being an interior to exterior system – the most popular choice for those in production sound. But Radius now plan to sell the Mini-ALTO with the grey fur option too: the longer grey fur offers slightly better wind-noise reduction (suggested as much as 5dB) and it is certainly the fur I prefer (not just on the Mini-ALTO: I have also chosen this for the various Radius furs that I have acquired for other windshields – from Cinela and Rycote and for my DIY blimps). To give me the complete set, Radius also sent me a brown fur, which is very similar to the black fur in terms of performance and feel. I’m not entirely sure whether it would help anyone recording nature sounds blend into the background!

Three colours of fur: the grey one is more matte and, with a longer pile, has slightly better wind-reduction performance.

Handling noise

Back in September 2023 I tested the RAD-1 and RAD-2 shock-mounts and was impressed by them. The question arising for me, therefore, is how the addition of the Mini-ALTO affects things, if at all? And having found the Nano Shield lyres better performing than the older Rycote standard lyres, how does handling noise differ between the two diminutive windshields. Time to whip out the boom-pole and a short stereo bar for some simultaneous testing, this time using the new Radius 55D hoops, and a matched pair of Rycote CA-08 mics.

First up, here are the spectrum analyzer visualizations of a static hold with the boom-pole extended, so that my muscles were shaking (a long boom, two mics and windshields and puny arms!):

Static extended boom-pole hold of Mini-ALTO 115 with 55D-shore hoops.
Static extended boom-pole hold of Nano Shield NS1-BA with 55D-shore lyres.

There is little in this, with the Mini-ALTO showing a slightly higher peak, but with a smaller frequency range and both are effectively removed by even a 40Hz high-pass filter (which would be a minimum for even the most static use of a handheld boom-pole). Giving the boom-pole some thumps again produces similar results:

Thumping of the boom-pole test: Mini-ALTO with 55D-shore hoops.
Thumping of the boom-pole test: Nano Shield NS1-BA with 55D-shore lyres.

And finally, here we have some deliberate shaking of the two windshields on the end of the boom-pole:

Shaking of the boom-pole test: Mini-ALTO with 55D-shore hoops.
Shaking of the boom-pole test: Nano Shield NS1-BA with 55D-shore lyres.

In short, I haven’t found there to be any significant difference from the shock-mounts when tested previously sans windshield baskets, and handling noise in both the Mini-ALTO and Nano Shield was well controlled, with resultant noise from normal use easily removed at source by use of a high-pass filter in the 40Hz to 80Hz range. Obviously different mics and more energetic boom-pole use might produce different results, but there is little doubt that the Mini-ALTO is competent in this regard.

Wind reduction

The internal diameter of the Mini-ALTO is, at 81mm, smaller than most basket windshields (with many designs, such as the Rycote Modular, being 100mm diameter). Even the Rycote Nano Shield has a larger cross-section, measuring internally 86mm high and, with its elliptical form, 107mm wide. It is for that reason that Radius Windshields have emphasized that this is a windshield designed for limited outside use and, of course, why they have larger models in the pipeline. Taking a larger windshield outside is not normally a concern for me, but there are occasions when a very compact rig is desirable and I was keen to test the Mini-ALTO against the Nano Shield (itself no slouch with wind reduction). Here are two clips recorded simultaneously on a very breezy day with both windshields rigged with matched MS pairs (each with a Rycote BD10 and CA08). When I say breezy, the wind speed was around 25 mph, gusting near 40 mph, so pretty tough conditions. No high-pass filtering was used when recording or in post, whereas, in this sort of wind some filtering would be used with most windshields.

As you can hear, and, to be honest, against expectations, the Mini-ALTO 115 does a slightly better job of wind reduction: for the test, I was using the initially supplied black fur with the Mini-ALTO, and the longer-pile grey fur, which I received subsequently, should improve things further. Of course, with an MS recording it is not immediately clear whether that reflects better side, front or all-round performance, so it is useful to look at what is happening with the fig 8 and cardioid mics separately, using a spectrum analyzer:

Mini-ALTO 115 with cardioid (CA-08) mic.
Nano Shield NS1-BA with cardioid (CA-08) mic.
Mini-ALTO 115 with fig 8 (BD-10) mic.
Nano Shield NS1-BA with fig 8 (BD-10) mic.

The difference in performance between the two small windshields evidently applies to both mics (and, thus, both forwards and sidewards). I was particularly surprised to see that the Nano Shield, with its greater width, did not show any advantage over the Mini-ALTO with the sidewards-facing lobes of the fig 8 mic. Of course, much of the significant difference seen in these spectrum analyzer visualizations would be removed by judicious use of a high-pass filter (the scale used here going right down to 1Hz), but, nonetheless, it is evident that there are significant differences in the crucial area between, say, 50Hz and 200Hz. How much of a difference any sound recordist will find between the two small windshields in use will depend on the mics used and the high-pass filtering (if any) applied, but there is a discernible difference between the two and, certainly, the wind-reduction performance in a blustery outdoor wind is better with the Mini-ALTO.

Composite view showing how the Sennheiser MKH 8030 sits within the basket of the Mini-ALTO 115: the capsule of the fig 8 mic is positioned forward of the double ring where the two pods join, but to the rear of the ring that marks the junction of the front end cap.

Transparency

When thinking about windshield performance many give little thought to transparency, but it is a key part of the equation and something that I have become more and more conscious of over the years, especially when using windshields with fig 8, omni and wide cardioid mics, where the polar patterns mean that baskets need to offer low colouration of sound beyond the front end of the windshield. Without an anechoic chamber it is difficult to get an exact read on the transparency of any windshield, but for a reasonable quick and dirty test I placed a bare mic on the windshield shock-mounts in front of a speaker (in my treated studio) playing pinknoise, then carefully added the basket without moving the mic for a second recording. I did this with a supercardioid mic (Sennheiser MKH 8050) head on, and then with a fig 8 mic (MKH 8030) side on to get a sense of how the two windshields compared at both angles. The results for each pair of recording were compared using a spectrum analyzer and overlaid as follows:

Pinknoise test with Nano Shield NS1-BA with MKH8050 supercardioid mic aimed at speaker: green is the bare mic on the shock-mount and the red overlay is the recording with the basket added.
Pinknoise test with Mini-ALTO 115 with MKH8050 supercardioid mic aimed at speaker: green is the bare mic on the shock-mount and the red overlay is the recording with the basket added.

With the supercardioid mic and the sound source on axis there is little colouration other, as would be expected, than some high-frequency attenuation: both windshields perform well in this test, which, of course, represents the primary intended function (i.e. a single directional mic for film, ENG, outside broadcast etc. ).

Moving onto a fig 8 mic with the windshields side on to the sound source, the results were as follows:

Pinknoise test with Nano Shield NS1-BA with MKH8030 fig 8 mic aimed at speaker: green is the bare mic on the shock-mount and the red overlay is the recording with the basket added.
Pinknoise test with Mini-ALTO 115 with MKH8030 fig 8 mic aimed at speaker: green is the bare mic on the shock-mount and the red overlay is the recording with the basket added.

Here the results differ: the Nano Shield shows similar (i.e. minimal) colouration as with its end-on test, while the Mini-ALTO shows more variation between the bare mic and the recording with its basket added: this is both above 4kHz and below around 150Hz. The latter represents some consistent bass attenuation, while the high-frequency colouration is more varied and potentially problematic. But before we get too concerned, it is perhaps worth including the results of the same test for the Rycote Cyclone (small):

Pinknoise test with Cyclone (small) with MKH8030 fig 8 mic aimed at speaker: green is the bare mic on the shock-mount and the red overlay is the recording with the basket added.

With the Cyclone, the colouration of the higher frequencies is more significant and extends much lower (to just over 2kHz, compared with over 4kHz for the Mini-ALTO). In both the Cyclone and Mini-ALTO designs there can be little doubt that the colouration of the sideward facing lobes of the fig 8 mic is a consequence of the plastic rings around the windshields (less substantial in the Mini-ALTO, although much closer to the mic), which, in both cases, are not problematic for sounds on axis to the windshield.

There is one thing demonstrating differences with this pinknoise test or, indeed, more exhaustive and expert tests in an anechoic chamber, but how does the colouration actually sound? It is hard to come up with a perfect test, especially with limited resources, but I have settled on an approach that some at least may find informative. Eschewing the variability of successive live recordings, I placed an omni mic in front of a single speaker in my studio and played back a short section of a recent recording of mine of a singer-guitarist (Luke Chapman): the mic was angled successively at 0 degrees, 45 degrees and 90 degrees, in each position with the mic in the bare shock-mount of the Mini-ALTO and then, without moving the mic, each time carefully adding the windshield. I then repeated the exercise with the Nano Shield for comparison. Obviously each set up will vary fractionally, but not for each pair of recordings (i.e. a given windshield at a given angle, with and without the windshield basket) and it is comparing each such pair where any value in the exercise comes. I left off the furs as a) the focus here is on the effect of the basket design and b) maintaining the exact position of a windshield while adding the fur is so difficult. Anyway, for better or worse, here are the resulting sound files:

If really keen, you can download the files and set them up in a DAW and flip between short repeated sections of each pair, which is what I have done. In all the recordings with the windshield you can hear the expected slight change to the high frequencies when the basket is added, and, as anticipated following the pinknoise tests, the Mini-ALTO 115 shows the most discernible difference at 90 degrees. I was pleased to note that such colouration isn’t obvious at 45 degrees.

I have heard (rather than just measured) similar colouration with the Cyclone with side-on sound sources. Although the Cyclone windshield is now sold with mid-side and double mid-side configurations, the basket was not designed for such use, and the primary purpose of the Mini-ALTO to house a single end-address microphone is even more evident. For that purpose the Mini-ALTO offers very good transparency. Whether or not colouration from the sides actually matters for those who wish to use the windshield will depend partly on whether planned use is for a miniscule mid-side rig or, perhaps, a pair of the windshields for spaced omni mics. And, of course, it will depend on the direction of the principal sound source(s), how transparent the recording needs to be, and whether the small size and convenience of a Mini-ALTO outweigh any such concerns. Many, perhaps without consciously considering transparency, make a similar compromise with the Cyclone for MS/DMS vs, say, the more transparent Cinela models (for a comparison of the Cinela Zephyx and Pianissimo models and the Rycote Cyclone for MS use see my tests and write up), or, indeed, using a pair of Baby Ball Gags for spaced omni mics. Needless to say, there are plenty of windshields with plastic rings in places that will colour the sound for certain polar patterns and arrays, and I should stress that the Mini-ALTO is not at all unusual in this regard. Aaargh: am I just getting obsessed with transparency?!

Conclusions

What then of the Mini-ALTO? There is no doubt that it is well-engineered and, as such, builds on the Rycote experience of the team: most of the design is more robust, and much more positive and quicker to put together and take apart than the Rycote counterparts, most notably the Mini-ALTO’s closest competitor – the Nano Shield. That its wind-noise reduction capability holds up to outdoor use in moderate conditions and, moreover, exceeds the Nano Shield (at least in my tests!) was unexpected, given the smaller cross-section, and for many this will be reassuring. As the saying goes, however, there is no such thing as a free lunch, and, just as I have seen when comparing the Cyclone to the less user-friendly Cinelas, the convenience and robustness come with the price of less transparency of the windshield off-axis. As with the Cyclone, this is almost certainly a consequence of the plastic rings that encircle the basket, and, of course, such rings are to be found on most cylindrical windshield baskets, including Rycote Modular models and the Rode blimp, and, equally, are found in the spherical Baby Ball Gags. So there is nothing new here and for most users – with single shotgun, supercardioid, hypercardioid and cardioid mics – this will simply not be an issue. And for many users with omni mics, wide cardioids or, indeed, mid-side or even double mid-side, a bit of colouration from the sides will either be unnoticeable or a price worth paying for size, robustness and ease of use. For some the Cinela COSI models may well be a better compact option, but until (unless?) the release of the prototyped MS COSI version that was shown with the MKH 8030 at its announcement in September 2023, the restriction of the COSI windshields to single mics makes them not quite so appealing to me personally.

It is clear that the Mini-ALTO isn’t a panacea for all problems for mics involving wind, but it was never intended to be so. What is evident is that it is an excellent compact tool for outside broadcast, ENG, some narrative recording purposes, and, some field and FX recording, above all for those who need to switch from a bare mic to moderate wind protection at the drop of a hat. It has been fascinating watching the Radius Windshield journey thus far to the point of production of their first full basket windshield, and it will be interesting to see the larger ALTO and, particularly, the CIRRUS in due course.

And a final note: do please remember that I have been field-testing a pre-production model, as have others (who will doubtless offer other insights: e.g. from experienced production sound or outside broadcast perspectives), and that there may be the odd minor tweak before the production run starts!

Pricing and availability

For many the price of different windshields will come into play when making choices, so it was interesting to hear from Simon Davies how the Mini-ALTO compares with the Nano Shield on this too. The latter is priced at £525 ex VAT for the kit (including fur and cable), while the Mini-ALTO 115, 180 & 210 kits (again with fur and cable) come in at £360 ex VAT. Without the cable, the kits are £320 ex VAT, and if you already have a RAD-2 shock-mount then the upgrade kit (without cable) is £270 ex VAT.

In terms of availability, the latest update from Simon Davies (22.1.2025) is: ‘We’ve set a formal launch date of 1st March for v1.1, however we’ll be releasing some units during February as they become available.’

Audio Gear

Musings on mic cases…

December 9, 2024
Two very different manufacturers’ mic cases from Rycote (left) and Sennheiser (right): both have their strong points, but neither seem suited to use in the field.

I appreciate it’s a little thing, but good mic cases for use in the field are not as easy to buy as you might think. Obviously, the needs of different recordists vary: if you are a classical music recordist travelling to a concert hall or church with a mass of mics and other more bulky equipment, then, perhaps, a large Peli case might be the answer. A similar solution might also suit the smaller mic collection of a sound mixer on set, where a sound cart means that equipment is bulky anyway. But for most of my use, and I suspect that of many others, I need mic cases that take up very little space in whatever I am carrying, yet keep the mics safe and easily accessible, be this for music recording on location or field recording for ambiences or sound effects. This short blog post is for those in the same boat, especially those who have yet to find a solution that works for them: others, I am sure, will have come up with better solutions than mine, or at least ones more suited to their needs.

First off, needless to say, are the cases that come with mics from the manufacturers. These vary hugely, although few are cases you would want in the field. The Schoeps ‘Desert Island Stereo Set’ is a welcome exception, with a diminutive stereo pair of mics and mic clips (perhaps of less use) in a dinky little Peli case, and is in sharp contrast to their usual wooden cases that are not so practical or space efficient in the field. My Rycote mics have compact cases, but are for individual mics or pairs, and the bulk soon adds up when taking several into the field. Their rather nice finish also doesn’t seem quite right and robust for the field. As for my Sennheiser MKH 8000 series mics, well they come in the same massive plastic cases as the older and larger MKH mics, so again are ones to leave at home.

The Rycote mic protector case (20cm model) and one of the three mic tubes inside: although I haven’t really found the overall case great (hence the label still on it all these years later!), the internal mic mic tubes have been useful!

My first foray into mic cases for the field was the Rycote mic storage case, which looked the part: a fabric-covered tough plastic cylinder containing three plastic tubes for the individual mics. It could have been good if only the three individual plastic tubes were a comfortable fit (they were far too tight, though, puzzling, not everyone found this to be so!), and again was bulky: not bag friendly enough for me. I never really used the outer case, but have used the individual plastic tubes for some years, and I know others like similar tubes (they can be bought much more cheaply outside the audio world). As the number of mics grew, however, I found a bunch of tubes knocking around the bottom of my bag less than ideal. That said, I do find them of use for shotgun mics, which are, of course, hard to combine with other shorter mics in a single case. What I wanted was a protective case that could hold a bunch of these shorter SDC mics together, and whilst looking into what others have found (including cigar travel cases!) I had the idea (doubtless not original) of using semi-rigid cases for 2.5″ external hard drives. They come with a bit of variance in size between makes and are well-suited to a bunch of smaller SDCs. The only problem was keeping the mics separate, so they didn’t bump into each other, and for that I used lens cloths, tucking up the mics for bed before zipping up the cases. The lens cloth business is not the hassle it sounds, but it does mean that when opening the case you can’t instantly see which mic is which.

More compact SDC mic storage and transport in shell cases for 2.5″ external hard drives. Here shown with relatively long AKG Blue Line mics, but shorter SDC mics can fit across the width of such cases. The right-hand image shows how I have actually used such cases, with a lens cloth protecting the mics from each other.

So after a couple of years of this, and with some of my mics not neatly fitting into such cases or not doing so efficiently, I began to wonder if there could be a better solution. I had another good look at the smaller Peli cases, thinking about 3d-printing a tray to fit, but for my SDC mics, the model sizes just didn’t seem spot on. And that is when I stumbled across rigid cases for 3.5″ hard drives, which, being a little larger than their 2.5″ cousins, seemed the perfect size for my use. Now these vary hugely and many don’t look suited for repeated opening and closing (I guess they are for storing internal HDDs in an office or store environment?), I found some (an obscure brand!) that are more robust: really tough plastic cases, a reasonable hinge and locking clip, good seals and shock resistance (dense EVA foam), yet overall size not too large: at 172mm x 125mm x 43mm, they still slip easily into my smallest field-recording bag. With a bit of a search and you will find the same or perhaps a better model. And with a 3d-printed tray (yes, more fun with the new 3d printer!), the mics sit neatly and securely (with the perfect amount of pressure from the lid’s lining in the dense EVA foam) and I can see all the mics at a glance – like a box of chocolates. So that’s my current solution for SDC mics today and easily the best I have found. I have no doubt it will change in the future as my mic collection changes or, perhaps, when I struggle to find similar replacement cases in the future, but the basic premise will remain. As I said, only a little thing, but perhaps my musings will help someone!

Slightly bigger, rigid and sealed 3.5″ hard drive cases. The EVA foam insert at the top (I removed the bottom one and replaced it with the 3d-printed insert tray to fit specific mic models) is dense and not prone to break down easily like many foams: it applies just enough pressure to hold the mics securely in place.
And the same again, but loaded with Sennheiser MKH 8000 mics (left) and Rycote mics (right). My current solution: for how long though?!
Audio Gear

Windshields for a mid-side pair? Comparing the Cinela Zephyx and Pianissimo with the Rycote Cyclone

November 25, 2024
The Cinela Zephyx (left) and Pianissimo (right) enjoying a sea breeze.

Introduction

One of the beauties of mid-side recording is its suitability for stereo recording outdoors, with the pair of mics fitting into a single windshield. This, and the fact that the fig 8 side mic can be omitted and just the mid mic used, has meant it has become a common tool for production sound recordists who occasionally need a stereo capability. But mid-side rigs are often a good solution for others recording outdoors too: those recording effects, sound libraries, ambiences, nature and, even, music. Over the years I have used a variety of windshields for mid-side recording, including the humble Rode mk 1 blimp (very flexible in terms of different mic combinations), the Rycote Nano Shield (a bit of a squeeze to get two mics inside), and, for LDC mics, my massive DIY blimp. My default windshield for mid-side recording of late, however, has been the Rycote Cyclone: more particularly the Stereo Cyclone Kit 5, which is configured for an MS pair of 19/20mm mics. And there are new compact options on the horizon: Radius Windshields is nearing production of its mini-ALTO and then ALTO windshields, which will have dedicated MS clips as options, and in Sept 2023 Cinela showed its prototype Cosi windshield for the MKH 8030 MS pair, although its production remains uncertain.

For this post I am focusing on three of the most popular options, and ones that are of a sufficient size to promise reasonable performance outdoors in more than a gentle breeze: that is Cinela’s Zephyx and Pianissimo, and Rycote’s Cyclone. I often read on field recording and similar forums how some recordists, not always beginners, consider just how good a small windshield to be, but, while there is a place for compact protection when wind is light, there is no getting away from the physics. If you need a solid introduction to that, I suggest starting with Bleazey, J.C., ‘Experimental Determination of the Effectiveness of Microphone Wind Screens’, Journal of the Audio Engineering Society (Jan 1961, vol. 9, no. 1), 48-54. Indeed, it is worth remembering that the windshields considered here are themselves compromised on the size front so as to be able to be used on a boom-pole or easily deployed in the field. And if you don’t believe me and the engineers, then keep on reading since, by way of an example, further down the post I do include a test of the Pianissimo vs the diminutive Rycote Nano Shield NS1-BA: not least because I have posted previously on my blog showing how you can squeeze an MS pair into the latter, and it is important to understand the limitations of such small rigs.

A few of the windshields that I have used for mid-side (MS) recording: some designed for it, and some adapted. The photo gives a useful sense of the comparative sizes of the three purpose-designed MS windshields considered here: the Cinela Zephyx, the Cinela Pianissimo and the Rycote Stereo Cyclone (which uses a Cyclone small basket).

The Cinela models tested are recently released variations set up for the Sennheiser MKH 8030 + MKH 8000 mics, and have dedicated MZL connections. As I began these tests, Rycote put into production two new MS Cyclones dedicated to the same mics (one with MZL connectors – the Stereo MS Cyclone Kit 17 – and one with XLRs – the Stereo MS Cyclone Kit 18), but I am using the older Cyclone Kit 5: it uses the same small Cyclone basket and I have set it up similarly as the new models in terms of lyre positions. With the tests relating to mid-side recording, the three windshields see a focus on aspects that might not be as relevant to, say, a shotgun mic: erratic off-axis response is typically a feature of such highly directional mics, whereas the sideways looking fig 8 mic of a mid-side pair demands much more transparency from the sides of a windshield and, therefore, this is examined closely here. That said, hopefully many aspects of the tests should be relevant to those thinking of using the Zephyx, Pianissimo and Cyclone for other mic configurations.

Design and construction

Before getting stuck into testing the three windshields, it is perhaps worth writing a few words on their design and build, not least as there isn’t a lot out there on the Cinelas in particular. Obviously, there is little purpose in repeating what is on the manufacturers’ websites, so do go and look at those: rather, I will cover the main points that have interested me from having the windshields in my hands.

Zephyx: The basket’s overall dimensions are a maximum of 175mm W; 257mm L; and 179mm H. The shape is better appreciated in the photos, and we should be grateful to Cinela for leading the way with the non-cylindrical approach. Weightwise, this version is 405g with the fabric cover only and 588g with the fur added. The grey injection-moulded vertical (longitudinal?) and horizontal ribs interlock and are glued, and there are additional small straight struts top and bottom. The basket comprises two parts, with the smaller rear part attached with lugs/clips (and this is easy to attach and remove). Removal of the rear part allows access to the interior, but this access is principally to allow the user to loosen the screw that holds the shock-mount in place: fitting and removing the mics (at least with this MS version) is not really possible unless the shock-mount is removed from the front basket part too. Even after several weeks of use, I didn’t grow to like the screw fitting of the shock-mount to the basket: it is fiddly. The mic shock-mount attaches to the four-armed suspension, which connects to the front (or main) part of the basket: the independent basket suspension was a revolutionary approach when first introduced with Zephyx in 2007. When whole, the basket has plastic rings top and bottom: the top one provides a fixing point for the vertical, or longitudinal, ribs, while the bottom one also houses the round plastic bellows that provide a flexible air seal between the basket and the shock-mount (allowing some independent movement). The ribs have T-shaped sections, 5mm wide and 8mm deep, so are quite chunky (more so than those of the Pianissimo). Although the ribs are doubled where the two parts of the basket join, this is to the rear of the mic capsules and, thus, this suggests that they are not too large an acoustic issue for MS mics: of course, in a basket designed from the outset for MS, this is perhaps to be expected. The version of the Zephyx for the MKH 8030 + MKH 8000 MS has a double-mic clip, top and bottom loaded, with elasticated ties to hold the mics in. Such ties were new to me, but, as long as access is good (i.e. out of the basket), they are easy enough to use and I like the fact that they are gentle on the mic bodies. The two elliptical E-OSIX (hardness grade 00) shock-mount isolators are canted in at the sides, supporting the mic pair at the middle of the MS clip. This is a quite different configuration than for earlier MS options for the Zephyx, and looks to be an improvement. In short, I am impressed by the design of the MS shock-mount from the bar that holds the suspension hoops upwards: I am a little less enamoured with the design and materials of the section below, with the screw fixing to the basket, the conn box (a little homely, but usefully smaller than the Rycote ones), the bellows, the XLR holder and the 3/8″ mount. Not to say that I had any problems with these lower parts, other than the fiddly screw, and that they aren’t all robust enough and effective: just not entirely what I expected on a relatively expensive windshield.

The Zephyx shock-mount removed from the basket.
The Zephyx with the basket attached: the rear cap has its small piece of fabric covering attached at all times.
Underside of the Zephyx showing the thin rubbery bellows, the pivot, XLR holder and 3/8″ mount.

Pianissimo: The basket’s overall maximum dimensions are 165mm W; 324mm L; and 140mm H. Weightwise, this version is 370g with the fabric cover only and 560g with the fur added, so a little lighter than the Zephyx. The grey injection moulding has the look of the sprues or, more correctly, runners, used for the Airfix kits I made as a nipper. It comprises two halves, top and bottom, which separate to allow access to the interior: unlike the Zephyx, you cannot remove the basket from the shock-mount, but that didn’t concern me, and I found it much easier and quicker to access the mics than in its older sibling. The fabric cover for the lower half stays on permanently, while the cover for the top half has to be put on after the two basket halves are joined (it is elasticated and overlaps the lower half of the basket). Although the four-armed suspension connects to the bottom half only, the top half has the same fixing points, which is surprising as the two half-basket mouldings are not entirely identical: the upper one lacks the integral thick ring at the bottom that allows connection to a boom pole or stand. No great significance, but, again, something I wouldn’t expect in a relatively expensive windshield. There are different gauges of plastic in the basket: 3.1-3.4mm diameter round minor ribs and approximate circles; 3.5mm wide x 6.7mm high T-shaped longitudinal ribs top and bottom; and three sets of T-shaped main cross-ribs c.8.0mm wide and 6.7mm high. The last expand into wide round feet, 15mm diameter, which form the push-fit connectors between the two halves of the basket: when joined together, these feet form six cylindrical posts 75mm high. Although the Pianissimo basket has smaller spaces between the basket components than the Zephyx, the lighter structure and placement of the larger elements means that, on visual grounds at least, the design looks to be more transparent. The main concerns from a mid-side recording perspective are the front and middle rings, with their thicker posts at the joins: the front one is positioned off-axis to a forward-facing mic, and the middle one, which is set behind the mic position a little, is positioned off-axis to the side mic. The version of the Pianissimo for the MKH 8030 + MKH 8000 MS has the same back-to-back clip for the mics and suspension as the Zephyx, which is excellent.

Pianissimo with top half of basket fitted.
Pianissimo with top half of basket removed, showing mic shock-mount and the four-armed basket suspension.
The Cinela windshield connections to boom poles and stands might be made out of a slightly unusual looking plastic, but I must say I do like the pivot/clutch on the Pianissimo: small, but really effective.

Cyclone: The basket’s overall dimensions are 160mm maximum diameter; and 285mm L. Weightwise, this version is 620g with the integrated fabric cover only and 744g with the fur added: so significantly heavier than the Cinela models, with the difference being greatest without the furs (the Rycote fur being lighter). While also being made of grey injection-moulded plastic, there are substantial differences from the Cinelas: the 3D-Tex material is integrated with the basket; the basket is quick to assemble and disassemble (leaving the shock-mount easily accessible) due to its form and connection (held together with magnets and four small levers); and the basket structure is made of smaller cells and ribs of smaller dimensions (3.5mm wide). The smaller cross-section of the ribs of the basket is countered, however, by more substantial mouldings at the top and the bottom (for connection to the shock-mount) and to allow the two halves of the basket to clip together easily, with magnets to aid the fit. As a result of the division of the basket into two parts, the junction of the front semi-dome with the tapering body to the rear is marked with a 19.5mm-wide plastic ring. I can’t pretend other than that this ring has made me wonder about the Cyclone’s suitability for MS as it is positioned on-axis to where naturally you would have the sideways-looking fig 8 mic: with that in mind, I have been using the Cyclone Stereo Kit 5 with the mics forward of this plastic ring, and I notice that is exactly how Rycote have set up their new MKH 8000-specific MS versions (the Stereo MS Cyclone Kits 17 and 18). Obviously the ring remains within the lobes of the fig 8 and the mics are now pushed rather further into the front cap than is ideal (I remember the advice of the designer of the original Cyclone, Chris Woolf, that this was to be avoided…). The basket suspension for the Cyclone is a lot more substantial than that for the Cinelas, which again adds unwanted bulk (and weight), albeit in arguably less sensitive locations than the basket ring: both the top and bottom parts house multiple lyre-like suspension elements to provide a flexible connection to the basket, and are joined by the removable C-arm. The latter itself provides an extra component within the basket, but it is set well behind the capsules of the MS pair so is unlikely to cause significant acoustic issues (DMS may be another matter: one for a later test). More positively, the Cyclone offers a lot more immediate flexibility than its Cinela counterparts: you can move the lyres, reverse them and, indeed, even replace them with Radius hoops should you wish, while the Cinelas very much come specific to the MKH 8030 MS pair, although additional suspensions for different mic set ups can be bought (at a significant cost).

The Cyclone with one half-basket removed.
The Cyclone shock-mount and basket suspension with the basket fully removed. If you want one with MZL connectors for MKH 8000 mics you will need the Stereo MS Cyclone Kit 17.

Overall, then, there is no doubt that the Rycote Cyclone is more flexible, makes use of more consistent materials, and seems better built and better engineered. But, and this is a big but, this engineering gives it some large and chunky components in the thick mouldings in parts of the basket (from an MS perspective, most concerningly the wide ring at the rear of the front cap) and the top, bottom and C-arm of the shock-mount/suspension.

Operation

The two Cinelas operate quite differently. As we have seen, while the Zephyx allows the shock-mount to be used without the windshield, the Pianissimo does not. The Zephyx, then, is like the Cyclone (where the basket and, if required, the C-arm can be removed), although the process of removing and adding the Zephyx’s basket is much more fiddly. For some, this ability to remove the basket may well be crucial: for example, if transitioning from outside to inside booming. That said, such a transition with a mid-side pair may be less common than with a single more directional mic. Certainly, having long used a Cyclone I have rarely found myself using it sans basket as a shock-mount: rather, I have found the ability to remove the basket primarily of use in installing and removing the mics, unimpeded. The ease with which the Cyclone basket can be removed and replaced is very different than with the Zephyx, which is rather more fiddly – it requires removal of the back part of the basket and unscrewing the knob below the mic suspension, with replacement being fiddlier still, getting the bellows in place and getting the screw into the hole. Far from ideal in the field, let alone in low light. So from a practical point of view, the apparent limitation of the Pianissimo of not being able to use sans basket is far from that: while still short of the slickness of a Cyclone, removal of the top half of the basket to get access to the mics is much easier than with the Zephyx.

Obviously the integration of the fabric cover of the Cyclone with the basket means that there is no additional process involved on that front, while both Cinelas need their fabric layer adding after the baskets are assembled. This is a little fiddly, but not as difficult as putting on their fur covers: both furs are unlined, quite stiff and with a coarse internal surface, so are much harder to fit than the lined Rycote fur. Indeed, all the Cinela preparation operations are much easier to do with the windshield in your lap than, say, on a stand at head level (if, for example, doing field recording): I have found myself pulling on a Zephyx fur with both hands providing counter-resistance to the considerable tugging by use of my forehead against the rear of the windshield. Fortunately, nobody has witnessed my clumsiness, and doubtless those using the windshields day-in day-out have mastered the techniques.

When it comes to mounting the windshields, there are differences again . The two Cinelas have XLRs close to the attachment point, evidently geared to boom-pole use, but with no flexibility in positioning, while the Cyclone allows rotation of the whole pivot clamp (indeed, swapping between a 3/8″ and quick-release versions) and the XLR, which is very useful for field recording set ups. Small details that may not matter to some. And this isn’t to argue that for my usage the external details of the Cyclone are entirely preferable: for instance, I have found the small pivot clutch of the Pianissimo easily the best of the three windshields, gripping well without recourse to an over-sized lever like the Cyclone.

Finally, there is the operational aspect of cueing. The Zephyx is harder to point in the right direction than the other two windshields, largely due to its more spherical shape, but also due to how the mics sit inside the basket.

So, operationally, although some have eulogized the Cinelas on all fronts, there is no doubt in my mind over a period of using the three interchangeably over six weeks, that the Cyclone is much easier to set up, add/remove the basket, and dress/undress with its fur. It is followed at a distance by the Pianissimo, and with the Zephyx very much in third place. Once ready to use, the Cyclone and Pianissimo are much easier to aim, with the Pianissimo slightly winning on this front and certainly so in terms of weight when on a long boom pole; the Zephyx is less easy to aim, which doesn’t only matter for production sound, but also for field recording – not problematically so for the latter use, just needs a little more care.

So the question you might be asking – and I certainly was having first set up the Cinelas – is the much-heralded performance of the Zephyx and Pianissimo evident and enough to outweigh any downsides? Well, high time for some testing then!

Handling noise

All three windshields have sought to tackle vibration by having baskets that have separate suspensions from the microphone shock-mounts. As we have seen, Cinela was the first to introduce this with the Zephyx in 2007, and it was then adopted in the Pianissimo (introduced in 2014, after the similarly styled, but longer, Piano model of 2012). Rycote introduced its version of independent basket suspension with the Cyclone in 2014. To compare the windshields I mounted two at a time on a stereo bar at the end of a boom pole and carried out both a static test (i.e. holding the extended boom steady so all that was transmitted was my muscles straining – not insignificant given the weight of two such windshields and my lack of muscle!) and a deliberately shaking/vibrating test. Given the similarity of the two Cinela mic and basket suspensions I found the difference in handling noise to be negligible, but they are both observably different from the Cyclone. Testing the static hold first, here are the sound file clips:

While rendering the clips I noticed that the LUFS for the Cyclone recording was slightly lower (1dB), but listening to the files it is clear that the additional energy in the Pianissimo recording is at a lower frequency and, consequently, to human ears it sounds much more effective. You can see this different frequency in the spectrum analyzer visualizations, with the vibrations falling away very quickly from around 50Hz in the Pianissimo compared to the Cyclone:

Static suspension tests of the Stereo Cyclone (top) and Pianissimo (bottom).

Moving on to the tests with the pair of windshields on the end of the boom-pole being deliberately shaken, here are the sound files:

Again, the Cyclone produces slightly less noise in the test (this time by 2dB when considering LUFs and with a peak 3.8dB lower), yet the frequency spectrum of the noise makes it more audible, as the spectrum analyzer visualizations confirm:

Shaking suspension tests of the Stereo Cyclone (top) and Pianissimo (bottom).

While the differences in the suspensions between the two Cinelas and the Cyclone are measurable and audible, it is hard to tell whether this will be relevant to any user: it will come down to a matter of how much movement is likely, be that fast boom swings (which seem unlikely with an MS pair), handling noise or, if stand mounted, transmitted structure-borne noise from the ground or the stand (the latter itself perhaps produced by wind buffeting), and the degree to which use of an HPF (and at what frequency) is acceptable. In practice, I have not found the Cyclone any less usable on shock-mount/suspension grounds than the Cinelas, but it is something to bear in mind: there is a difference and it may well matter to some users. Certainly it is likely to matter to production sound recordists using versions of the baskets (very probably not the MS variations considered here) on boom-poles.

One interesting aside on suspensions and handling noise is the question of reduction in the mass of the MKH 8000 mics by use of the MZL connectors. MZLs are great when you want to reduce the visual impact of the already small mics (say while recording a live or filmed performance) or where reduction of the bulk of the mic helps acoustically (most obviously in double mid-side – or DMS – recording), but it isn’t entirely clear to me why it is so advantageous for an MS pair in a large windshield, where the additional mass of the MZX 8000 XLR modules and then the XLR plugs themselves may well help lower the resonant frequency of the spring system of the shock-mount (something that Chris Woolf discusses in his eminently readable article ‘Keeping Microphones Quiet’in LineUp 120 for summer 2009, which is freely available via the IPS website). Indeed, when including the pair of MZF 8000 ii filters when he sent the Cinelas, Philippe Chenevez made the point that this was because ‘the suspension is optimised for those, whatever [sic] you switch the filter on or off’: in other words, the additional mass seems to be helpful (although, of course, in addition to its switchable 70Hz HPF, the MZF 8000 ii has a fixed low-cut filter at 16 Hz). More prosaically, the additional length from the MZF filters helps with fitting the mics, but then so would the MZX 8000 XLR modules and, of course, if XLR connectors were used then other similarly-sized mics could be used interchangeably. That’s certainly the case with the Cyclone model used for these tests, which I use equally happily with the Rycote range of mics.

Transparency

I really began to think about transparency of windshields when finally getting around to comparing the wind reduction performance of my massive DIY blimp (built for LDC mics many years ago) to that of my smaller windshields: I had never tested the DIY blimp with SDCs before. As expected the reduction in wind noise was considerable, which is the inevitable consequence of its large size, but I was surprised by how much more transparent it was: I could hear much more in the way of leaves rustling and birds tweeting. What was unclear was how much this was to do with differences in size, coverings, basket design/construction, and shock-mount and other internal differences. Of course, some attenuation of higher frequencies is to be expected from a windshield covering, especially fur – that’s the quid pro quo for wind noise reduction – but, evidently, additional colouration should be minimized: this seems especially relevant to mid-side stereo pairs in a windshield. So a considerable amount of my time testing these windshields was focused on transparency, comparing, where possible, the impact of the bare shock-mount, then the bare basket, the basket with any fabric added (or permanently fixed to the basket), and the impact of adding fur. The tests were carried out using an MKH 8040 cardioid and MKH 8030 fig 8 pair rather than a calibrated test mic: this was due to the shock-mounts (and for the Cinela windshields, the connectors) being designed for such mics, and because I wanted to test the windshields with the actual mics that would be used and in the exact positions in which they would be placed.

In the absence of an anechoic chamber, I started off by making quasi-anechoic measurements, in which room reflections are removed by adding a gate, or time-window, which in this case was 5ms. This meant that lower frequencies were not measured, but this wasn’t a significant concern as my preliminary rough tests showed that colouration only became significant – and significantly different – at higher frequencies. To allow repeatability as I swapped windshields, added baskets to shock-mounts etc. I took a leaf from the Dambusters: instead of using convergence of angled lights to show an exact distance (in that case 60ft above the reservoirs) I applied Benjamin Lockspeiser’s inspired idea to angle two laser levels to coincide on the centre of the mic capsules, allowing me to set and reset distance and height to millimetre accuracy. By angling the two laser levels on axis to the loudspeaker and at 30 degrees, alignment of the mic bodies was also made easy: to reduce the number of measurements to something manageable I had decided to measure head-on (0 degrees) and at 30 degrees with the forward-facing MKH 8040, and at 60 degrees and 90 degrees with the sideward-facing fig 8 mic. Not the full 360 degrees of a polar plot, but, of course, with a full frequency sweep from 200Hz to 20kHz. Simplifying things by reducing the number of angles was just as well as it still took me 11 hours to work through the measurements, each time leaving the test room to control things (via REW software) from my PC: maintaining stability of the windshields while progressively adding baskets, fabric and fur took immense patience and, in some cases, multiple attempts. I am only too aware that much better and more comprehensive measurements could be achieved with an anechoic chamber, better equipment and more expertise, but this is at least an attempt to carry out measurements and I am happy enough with the broad gist of the results.

Lining up the mics for quasi-anechoic tests with a pair of converging lasers (not easy to see the red one, I know): a touch of the Dambusters!

I began the series of measurements looking at the impact of shock-mounts alone. This was measurable with the Cyclone and Zephyx, as only they can be removed from the basket. There was a modest, albeit quite noticeable, impact at 0 degrees vs the bare mics in a back-to-back clip mounted in the simple mic clip provided by Sennheiser, becoming more significant at 30, 60 and 90 degrees with the Cyclone, probably due to the large plastic C-arm (left in place for this test) that links to the top of the basket. Moving on to the impact of bare baskets, this was measurable with the Zephyx and Pianissimo only, as the Cyclone 3D-Tex fabric is bonded to its basket. This showed reasonably increased colouration over shock-mounts only, most noticeable at 30 and 60 degrees with the Zephyx, which makes sense when you consider the more substantial impact of the basket ribs (which are much larger in cross-section than those of the Pianissimo) at such angles. As a comparison, I measured the impact of my massive DIY blimp basket, which was negligible in comparison, as would be anticipated given its open structure and the thin structural components (3mm diameter stainless-steel wire). However, windshields need a covering to be useful, so, though the shock-mount and basket components will have an acoustic effect, sometimes considerably so, it makes sense to look in more detail at the measurements with coverings on.

Rycote Cyclone Kit 5: sound pressure level (SPL) 1kHz-20kHz with MKH 8040 and sound source at 0 degrees (i.e. straight on axis). The black line is the reference of the bare mic (albeit in an MS pair, with back-to-back clips, a simple mic clip and on a stand). The green line shows the basket (which has integrated fabric) and the red line shows the windshield with fur added. All these graphs have 1/48 smoothing.
Cinela Zephyx Z-8030-8040 with MKH 8040 and sound source at 0 degrees. The black line is the bare mic reference, the green line represents the basket and fabric, and the red line shows the windshield with fur added.
Cinela Pianissimo PIANI-2-8030-8040 with MKH 8040 and sound source at 0 degrees. The black line is the bare mic reference, the green line represents the basket and fabric, and the red line shows the windshield with fur added.

With a straight-on signal to the front of the windshields the performance of the three baskets with the addition of the various fabrics supplied shows a fairly modest colouration of the sound, broadly consistent across the different models, with very little attenuation. The addition of the fur shows, as expected, a significant attenuation in high frequencies, beginning as low as 1kHz. The Cyclone and Zephyx are close in this test, with the Pianissimo performing less well, especially from around 12kHz where the attenuation increases significantly. I found almost identical results when repeating the test, but swapping the long-pile fur for the short-pile fur also supplied. Thinking more generally about the attenuation from fur, below is a graph showing the same test but with my massive DIY blimp, in which lined fur (both lining and fur supplied by Rycote many years ago) sit directly on a more open basket, which itself has no fabric covering. In this case, the impact of the fur is much reduced, and there is very little attenuation of high frequencies: food for thought.

DIY windshield for LDC mics with MKH 8040 and sound source at 0 degrees. The red line shows the windshield with fur added, and the minimal attenuation of high frequencies that is in contrast to the smaller windshields above, with more complex basket constructions and tight fabric coverings of the baskets.

Anyway, back to the three windshields we are primarily concerned with here! Turning to their transparency at 90 degrees is particularly relevant to their MS use, as this is, of course, on axis to the fig 8 side mic.

Rycote Cyclone Kit 5 with MKH 8030 and sound source at 90 degrees (i.e. straight on axis to the fig 8 mic). The black line is the bare mic reference, the green line represents the basket and fabric, and the red line shows the windshield with fur added.
Cinela Zephyx Z-8030-8040 with MKH 8030 and sound source at 90 degrees (i.e. straight on axis to the fig 8 mic). The black line is the bare mic reference, the green line represents the basket and fabric, and the red line shows the windshield with fur added.
Cinela Pianissimo PIANI-2-8030-8040 with MKH 8030 and sound source at 90 degrees (i.e. straight on axis to the fig 8 mic). The black line is the bare mic reference, the green line represents the basket and fabric, and the red line shows the windshield with fur added.

Not unexpectedly, when the sound is measured from the side of the windshield, the Cyclone is showing significant colouration from around 7kHz, with a series of peaks and troughs from around 9kHz: that these are seen in the basket + fabric measurements as well as with the fur on confirms that they relate to the basket design, with the obvious culprit being the large plastic ring around the windshield that joins the cap to the tapered body. I understand from Rycote that the suggested set up for the new MS Cyclones for the MKH 8000 mics, whereby the mics are pushed forward into the end-cap, is a consequence of measurements of the impact of this plastic ring in the anechoic chamber: my crude measurements previously with pink noise suggested the same, and, as I mentioned previously, I have followed Rycote’s proposed more forward positioning. The Zephyx sees some similar, but much reduced, behaviour to the Cyclone from around 9kHz too, affecting basket + fabric and fur, while the Pianissimo sees little attenuation with the basket + fabric at any frequency and, in a sharp reversal of its performance at 0 degrees, some fairly modest attenuation when the fur is added.

With no published data for windshields (if only we could have detailed polar plots and frequency response graphs with, say, a measurement omni mic for each windshield basket design), I found making my measurements (necessarily many more than included here) an instructive if painfully long process. It confirmed my suspicion that none of the windshields was free of colouration, suggested that the Cyclone held its own with forward-facing mics, but that the Cinelas had better all-round transparency, and, above all, that they did not suffer from anything equivalent to the impact of the Cyclone’s wide plastic ring on the fig 8 mic. Again, as with the difference in handling noise, whether or not the different transparency matters is another thing: given these tests and what I have noticed with a more informed ear as I listed to my MS field recordings, I would be less inclined to use a Cyclone with an MS rig for the most demanding situations (say outdoor acoustic music recordings), but for many a field or sound effects recording, I suspect that the colouration would be too subtle to notice. Anyway, after all this measuring, with relief, I packed away the laser levels, restored furniture to the test room, turned off the PC, and headed outside…

Wind reduction

While much of this post has been about the compromises that windshields bring – the fiddliness and faff, the inevitable effect on the sound recorded – the bottom line is, of course, the ability to reduce the impact of wind noise on the microphones, whilst keeping these downsides to an acceptable minimum. After weeks of a strange anticyclonic gloom in October and November, at last the weather changed so I headed up to the coast at Cley to get a bit more wind to compare the difference between the two Cinela models. Pointing them into the northerly onshore wind, I first tested the Cinelas with just their fabric covers on (these being a double layer polyester/polyamide fabric), and here the Zephyx clearly won out by a substantial margin, presumably reflecting its larger size and more spherical shape (the latter better for turbulent wind):

Putting furs on made a huge difference, as expected, but interestingly the difference between the two models is much reduced, although the Zephyx still performed better in terms of wind reduction. And in neither test is there an obvious difference between the two windshield models in the recording of the footsteps walking past on the shingle, which were included to get some sense of the effect of the wind reduction on higher frequencies. Admittedly, this isn’t as nuanced as recording an acoustic instrument or vocal, but in the real world these are unlikely to be recorded on an exposed windy shingle beach.

With the strong sound of the wind and the sea beyond, and the fact that the incoming spray wasn’t doing my specs or the equipment any favours, I thought perhaps something more subtle might be equally, or more revealing, so beat a retreat to the garden. There, in addition to wind, there was the noise of leaves moving, the singing of the odd bird that forgot to migrate somewhere nicer for winter, and other village street noises. Again I kicked off with the Zephyx with just its fabric cover, but this time compared it to the Cyclone also without its fur:

The difference between the two windshields is very obvious, with the Cyclone picking up so much more wind noise. Of course, the construction is quite different – the Zephyx having its fabric ‘Z-cover’ stretched over the basket, while the Cyclone has its 3D-Tex material built-in to the basket, with plastic elements of the latter remaining exposed.

Adding furs reduced the wind noise, of course, but the difference between the two windshields remains very evident.

Now that’s more like wind! OK Storm Bert might imply something more dramatic than was the case – certainly far away from the centre, here in Norfolk – but wind around 20-25 mph with gusts over 40 mph was welcome after weeks of anticyclonic gloom. Here we have the Pianissimo (foreground) and the re-purposed LDC DIY blimp (background).

With Storm Bert hitting the UK, scope for windier tests improved, so I went through a whole sequence of comparisons with the MS pairs, each time comparing the Pianissimo to another windshield. First is a variant of the last clips, albeit with more wind, being the Pianissimo (with its long-pile fur) vs the Cyclone (with its fur, of course):

And here are the spectrum analyzer visualizations of the difference between the two, with the audible component (say above 20Hz) clearly greater with the Cyclone.

Pianissimo (top) vs Cyclone (bottom) performance in wind: fig 8 mic only.

As we saw (or heard) with the Zephyx vs Cyclone comparison above, the difference between the two windshields is substantial again, with the Pianissimo offering much better wind reduction that the Stereo Cyclone.

With the gusty wind, I thought it would be interesting to repeat the Pianissimo vs the Zephyx test, this time without the background white noise of the sea. First up is the Pianissimo:

And here is the recording of the Zephyx:

The differences between the two are perhaps rather more evident than in my tests on the beach, and, clearly, of the two Cinelas the Zephyx does a better job at reducing wind (entirely as expected and as advertised, I should hasten to add!). Again, we can see the differences in the spectrum analyzer visualizations:

Pianissimo (top) vs Zephyx (bottom) performance in wind: fig 8 mic only.
The Kelly rain cover on the Pianissimo. I must confess it took me worryingly long to work out why it had such a name!

A slightly unexpected extra in the package from Cinela was a Kelly rain cover for the Pianissimo. I must confess that it will take more than a cheerfully named rain cover to make me think I am Gene Kelly and feel like singing or, rather, recording in the rain – I am a fair-weather recordist – but for some dealing with rain is unavoidable: a few hardy souls even choose to record in the rain. Comprehensive testing of the Kelly is rather outside the scope of my recording experience, but, with the rain cover in hand, I thought that a wind test might prove useful (it is a choice between the Kelly and the fur: you can’t have both on the windshield at the same time). Now, this comparison is between the Pianissimo with the Kelly and the Zephyx with fur: not quite like-for-like, but the two windshields are similar enough and the differences so dramatic that the test is perhaps worth including here:

Pianissimo with Kelly rain cover (top) vs Zephyx with fur (bottom) performance in wind: fig 8 mic only.

Obviously, the rain cover is not something you would deploy unless absolutely necessary. And, of course, it’s function is for rain not wind although, of course, wind and rain often go together (certainly here in the UK!). As the Cinela website says: ‘Depending on the strength of the wind and the intensity of the rain, you have to make the best choice between adding the fur or the rain cover. Your experience and your ears will guide your choice!’ Indeed.

Rycote Nano Shield NS1-BA adapted with Radius hoops and 3d-printed MS clips and mount to hold a MS pair centrally.

Right, and here for something different in the last of this particular batch of tests is a comparison of the Pianissimo with the Rycote Nano Shield, which I promised at the beginning of the this blog post:

As expected, there is a lot more wind noise in the diminutive Nano Shield NS1-BA when coping with the lively wind, and it runs up into much higher frequencies than you’d want (i.e. hard to remove without a high-pass filter set horribly high for most uses – say 200Hz or higher), as evident in the spectrum analyzer visualizations:

Pianissimo (top) vs Nano Shield (bottom) performance in wind: fig 8 mic only

While using the Cinela windshields over many weeks I got better at putting the furs on and taking them off (and I guess they would get more supple with use), but still I wasn’t keen on the fiddly process, and began to wonder just how different they would be with a lined fur. Radius Windshields make aftermarket furs for other makes of windshield, such as Rycote and Cinelas, so I tried a pair of these (thanks to Simon Davies). As expected, fitting was so much easier with more suppleness and the lining making the furs slide on smoothly, but what about performance? Testing was a bit difficult, what with having one of each model only, but trying different combinations of furs (including, as controls, both windshields with the original furs and both with the Radius alternatives), it became clear that while so much easier to deploy, the Radius furs (which are very much the same as Rycote ones: not surprising given their pedigree) offered no performance gain, and, if anything, the original Cinela furs (or at least the long-pile variants) have a slight edge.

Testing aftermarket lined furs by Radius Windshields on the Pianissimo and Zephyx: much easier to fit and remove, but just slightly less effective. A price worth paying?

Anyway, you can judge for yourself in these test files, for which, for a change, I have uploaded the MKH8030 fig 8 tracks only. First off, here are two ‘control’ recordings, with both the Zephyx and the Pianissimo wearing their Cinela furs:

As per the previous tests, the Zephyx has a slight edge in terms of wind reduction. And here are the recordings with the Pianissimo sporting the Cinela (long-pile) fur and the Zephyx with the Radius fur:

There’s not a huge amount in it, and the differences may well be much reduced (or disappear) if using a high-pass filter (you can download the files and have a play in your DAW to examine the effect of your likely HPF settings), but if trying to squeeze every last drop of performance out of the windshields, then the Cinela furs appear to have the edge. But if you are continuously taking the Cinela furs on and off, it is perhaps useful to know that there are some competent alternatives that would make life easier.

And as something of a total aside (I’ve accepted that this is going to be a very long post anyway!), if you are unfamiliar with the physics that relates size of windshield to effectiveness, the Radius furs gave me a chance to make a direct comparison with my large DIY blimp. First off is the Pianissimo with the Radius fur:

And here is the DIY blimp with pretty much identical fur (it has fur and lining provided some years ago by Simon Davies, when running Rycote and, not surprisingly, it seems pretty much identical to the Radius furs):

Pianissimo with Radius fur (top) vs DIY mega blimp (bottom) performance in wind: fig 8 mic only.

The differences are significant and, with some background voices of passing walkers, you can also hear the increased transparency of the DIY blimp in the field. Of course, this doesn’t help you if you wish to boom an MS pair or, indeed, travel very light for field of effects recording!

NB In all these wind tests do note that I used no high-pass filtering at all either in the field or in post, so do download the files and play around. My main aim was to show the differences between the three windshields without the masking effect of HPFs being applied. If you are really keen, you can decode back to M and S if, for example, you wanted to hear the difference just on the forward-facing mid mic to compare the windshields for non-MS use.

Pricing

I haven’t mentioned pricing at all so far, other than oblique references to the windshields being expensive. All three are not cheap, which is, perhaps, which is often a bit of a surprise to some: I think this stems from the plastic construction, which lends itself to mass-production, and that the designs of the baskets and main components are not new (so you might hope that the R&D and tooling investment for the injection-mouldings would be offset by now). Anyway, all three cost no more than one of the MS mics inside!

Here in the UK, the Rycote price is easiest to establish: looking at the prices at Pinknoise (and I would use them for any such purchase), the Stereo Cyclone Kit 5 is priced at £758.40 (inc. VAT). The two recently announced versions specifically for the MKH 8030 + MKH 8000 MS are pricier, with the one with MZL connectors – the Stereo MS Cyclone Kit 17 – naturally being more expensive (at £888 inc. VAT) than the one with XLRs – the Stereo MS Cyclone Kit 18 – at £834 inc. VAT (both prices at Pinknoise again). None of these comes with the small Cyclone fur, which you will almost certainly need: this costs another £138 inc. VAT.

It is harder in the UK to establish the price of the Cinelas, since I can find no stockist of these specific models. I am sure that Pinknoise, Soundkit or similar specialist retailers who sell other Cinela models could order either, but I have found prices for both at Audiosense in Brussels, where the Pianissimo (the Cinela Piani-2-8030-8040) is €1,171 inc. VAT and the Zephyx (the Cinela Z-8030-8040-MS) is €1,411 inc. VAT. At today’s exchange rates, these equate to £977 and £1,177 respectively, which are pretty much as I would expect from the prices of other MS versions of the Pianissimo and the Zephyx that are stocked in the UK. Given that both Cinelas come with furs and travel cases, I can’t really see the price would be a determining factor in making a choice between the three.

Quite different cases for the Pianissimo (left) and the Zephyx (right), with pros and cons (room for furs etc. vs overall size), but good that they – and the furs – are included with the Cinelas.

Conclusions

So where does this leave me or anyone else so minded? Cinela windshields have an excellent reputation amongst professional sound recordists, especially those involved in production sound. Often they are described as the best available and a definite step up from the more prevalent Rycote models, but, in the absence of much comparative testing, it was hard to know what to make of the largely anecdotal evidence. Having had the Pianissimo and Zephyx in my hands for over six weeks, the short answer is that I am impressed, and there is no doubt that they have a significant edge over the Cyclone in terms of pure performance as windshields, not least – as this was the underlying aim of the tests – ones suited to a mid-side pair. That said, I have been a little surprised with some aspects of their construction and the elements of the designs that make them fiddly to use (most especially the means of disassembling and reassembling when changing mics: this is especially the case with the Zephyx), and which are so much better addressed in the Rycote Cyclone.

The design of the windshields has meant there are inevitable compromises in all three cases, some of which they have in common (e.g. overall size). And it is clear that there could be a still better solution within the general design parameters: that is, a windshield as light as the Pianissimo and as effective at reducing wind noise and handling noise as either Cinela, but with a bit more transparency than either of them and, above all, with more of the operational convenience of a Cyclone. But dreaming of non-existent products aside, if I was booming a shotgun mic or a supercardioid mic on a long boom-pole and not continually swapping in and out mics, there is no doubt I would choose the Pianissimo, on grounds of weight, ability to aim and its excellent handling and wind-noise reduction. If you want an MS rig on a long boom-pole, then this is the way to go too. But that isn’t my usage of MS: typically, I am using MS in the field for effects recording with mics on a stand, and frequently swapping out mid mics (changing from omni, to wide-cardioid, to cardioid and supercardioid) and the whole MS pair, and putting the fur on and taking it off again depending on the wind level. And then I am recording music outside, where the lack of complete transparency of any of the options becomes perhaps more evident, but especially with the Cyclone. So I am left scratching my head. Should a sound recordist in similar shoes accept the lesser high-wind reduction of the Cyclone (which, I should clarify, is not at all shabby anyway: it outperforms my other windshields) and the acoustic effect of its large plastic hoop on the fig 8 mic as compromises worth making for increased ease of use in the field? Or should the recordist go for one of the Cinelas, with greater transparency overall and better handling and wind-noise reduction, and just accept it will be less easy to rig? OK, as we have seen, this could be made a bit easier by recourse to an aftermarket lined fur from Radius Windshields, but at the cost of a slight loss in wind reduction performance. And if a recordist is to choose a Cinela, should they go for a Zephyx with its better performance in wind, or the Pianissimo with its greater convenience and ease of aiming? A bit of a dilemma for the recordist that I cannot resolve: what I hope, rather, is to have provided some useful comparative information and food for thought for those looking for capable MS windshield solutions and weighing up these three options. Personally, I would be rather pleased if the Pianissimo didn’t have to disappear back to Paris!

NB Just for transparency, the Cyclone model tested here is one I have been given previously by Rycote for testing, while the Pianissimo and Zephyx have been loaned by Cinela.

Audio Gear Audio Projects

MKH 8030 pair: a Blumlein variation for singer-guitarist Greg Brice

September 23, 2024

Blues singer and musician, Greg Brice, was up from the Cotswolds to Norfolk for a gig, and while he was here we headed over to the workshop of Luke Chapman (woodcarver and a blues musician too) to record and film a couple of songs. Greg is an up-and-coming musician, which is reflected in his three nominations in the 2023 UK Blues Awards: he was a finalist in the ‘Emerging Act of the Year’ category. The workshop, which was formerly a farm dairy, is decidedly not a music studio, but with a recent album out that wasn’t the aim. Rather we wanted to capture a couple of live acoustic recordings on location. As sharp-eyed readers of this blog may have noticed, the workshop is somewhere I have used before for recording, sometimes for mic tests and sometimes for more full-fledged recordings. In fact, Luke and I are thinking of getting many more musicians to record there in a kind of down-home NPR Tiny Desk Concert meets Gems on VHS series, but with extra sawdust on the side. So Greg was the first, and hopefully not the last, of the new ‘Milk, Wood and Dust’ sessions.

Close-up of the three-mic array, showing the angled capsules of the side-by-side MKH 8030 fig 8 mics.

The usual problem when recording a singing guitarist is to get good separation between the instrument and the vocals (to allow different tweaking of levels and other processing later), without resorting to recording them separately: overdubbing often results in a less than fluid performance. When I recorded singer-songwriter Lucy Grubb in the workshop last year, I went for a variation on double mid-side recording, with two mid mics facing forward: one upward to her mouth and one downward to her guitar, with the nulls of the mic polar patterns reducing spill effectively. It is a simple set up that also has the merit of being less visually intrusive than an LDC right in the singer’s face. There is a Sound on Sound article by Hugh Robjohns from a few years ago that discusses and illustrates the approach. It’s a bit of a clunky set up, however, and the stereo vocal seems a bit unnecessary (and potentially problematic as singers often move their heads about), so I have been thinking about another technique also making good use of the deep nulls of fig 8 mics, but aiming to get a stereo recording of the guitar and the voice in mono.

What I came up with as a solution was a Blumlein pair of fig 8 SDC mics (in this case the excellent new Sennheiser MKH 8030, which I have been testing in various blog posts: see here for part 1), combined with a super-cardioid for the vocals (I went with a Sennheiser MKH 8050). To keep it compact I placed the two fig 8s side-by-side instead of in the more usual end-to-end arrangement: now some theorists will break out in a cold sweat and say this isn’t Blumlein, but the reality is that, with capsules only at 23mm centres, the very slight non-coincidence has little impact (and, of course, is nothing compared to the spacing in near coincident pairs, such as the Gerzon array, ORTF and NOS). Equally, a bit of shadowing of the rear lobes is no big deal as they are only capturing a little uncorrelated reflected sound from distant walls. With the super-cardioid mic placed on top, the tight cluster (which I placed in a single shockmount: a Rycote InVision USM-L) was positioned around chest height and angled so this pointed upwards for vocals, with the Blumlein pair then angled down towards the guitar. This left the nulls of the fig 8s and the super-cardioid to do their work and minimize bleed from guitar to vocals and vice versa: and any bleed left was coincident and consequently sans phase issues. Now, it may well be that others have used this approach before, but I can’t find any reference to it: I wonder if this reflects that it is best suited to SDC mics and many will not have more than one SDC fig 8, if that.

I did a few tests beforehand and was happy with how the array sounded, so when Greg came over to the workshop I put it into action. Set up was easy, with the mics fairly close (the acoustic of the workshop is OK – and certainly without a ‘small room’ sound – but it isn’t the Wigmore Hall), but distant enough and off-axis so that no pop filter or foam was required for vocals, which would rather have worked against the minimalist approach. I was pleased with the results (and so was Greg), and see this as a discreet and quick to deploy array (I had the mics ready to roll in the shock-mount already), which will really suit more singer-songwriters down in the workshop or, indeed, similar recordings elsewhere on location. Have a listen and, if you think there is any merit and you have a pair of SDC fig 8s, perhaps give it a try.

Audio Gear

Sennheiser MZF 8000 ii

August 24, 2024
The MZF 8000 ii filter up close…

My series of field tests of the new Sennheiser MKH 8030 fig 8 (which kicked off with initial tests, moved on to mid-side recording, encompassed field recording, included comparison with the MKH 30, and most recently included use in a native B-format array) have led to various questions being asked of me, both via this blog and on sound forums. An interesting one was whether the mic needed the modular filter that Sennheiser make for the MKH 8000 series: the MZF 8000 ii. This filter was announced at the same time as the MKH 8030, in September 2023, but, as I understand it, was available beforehand as a special order option instead of the original MZF 8000. Both filter modules are the same in terms of the switchable -10 dB pad and the fixed low-cut filter of –3 dB @ 16 Hz (18 dB/oct), but differ with regard to the switchable low-cut filter: on the newer filter the latter is –3 dB @ 70 Hz (18 dB/oct), compared to the original’s –3 dB @ 160 Hz (which was much less steep too: I can find no authoritative specs). This stems from understandable user feedback, since a lower and steeper HPF around the 70 Hz frequency of the new filter is of more use to broadcast and filmmaking sound for those mics in the MKH 8000 series that don’t have in-built bass roll-off (i.e. all except the MKH 8060 and MKH 8070 shotgun mics): more use, that is, for reducing low-frequency wind noise and handling noise.

While some might (and, indeed, do) lament the absence of a built-in pad and switchable low-cut filter in the MKH 8000 mics, as found in the earlier MKH mics, the modular nature of the MZF 8000 ii filter means it is more flexible and, also, the end result is quite different. Flexibility is seen in the fact that the MKH 8000 mics, sans filter, can be kept small and, moreover, when the filter is used, this can be placed either between the head and the XLR module (making for a 29mm longer mic) or, if using an MZL cable, well away from the mic head, and next to the (then remote) XLR module. As for sonic differences between the MZF 8000 ii and the in-built equivalents of the MKH 30, 40 and 50, arguably the fixed 16 Hz low-cut filter of the former simply compensates for the increased bottom end of the MKH 8000 series mics, but there remains quite a difference in the switchable low-cut filters: the MKH 30, 40 and 50 have much higher and gentler low-cut filters, designed to address proximity effect, rather than the lower and steeper filtering of the MZF 8000 ii filter that is geared to reducing wind and handling noise. And, to add complexity, the MKH 20 switchable filtering is only concerned with high frequencies, being to modify the mic between near and diffuse field applications (with, of course, the proximity effect not applying to an omni anyway). The earlier MZF 8000 filter, therefore, was more comparable to the switchable elements of the MKH 30, 40 and 50, while the newer MZF 8000 ii is more overtly geared to production sound.

A pair of MKH 8030 mics: one with the MZF 8000 ii filter and one without.

OK, so much for the theory: how does the MZF 8000 ii perform? With the focus of the MZF 8000 ii on production sound, I fitted the filter to one MKH 8030 and mounted a pair of the mics in Rycote Invision 7 shockmounts to a short stereo bar on the end of a carbon-fibre boom pole. First off I compared the impact of mild shake (from straining muscles) on the two mics, with no high-pass filter (HPF) on the recorder, and just the fixed 16 Hz low-cut filter on the one with the MZF 8000 ii module fitted.

MKH 8030 on boom pole, with no filtering to remove low-frequencies arising from handling noise (note the scales and that gain was cranked up for all these tests).
Recorded simultaneously with the above, but recorded with a second MKH 8030 with the in-built fixed low-cut filter of –3 dB @ 16 Hz (18 dB/oct) of the MZF 8000 ii.

As expected, the MZF 8000 ii filter removes a significant amount of the infrasound, whilst having little impact on other low-frequency performance.

Moving on now to compare the effects of using the high-pass filters built-in to most recorders and mixers versus, or in conjunction with, that of the MZF 8000 ii filter, first of all I repeated the boom pole test with one mic with the recorder’s 40 Hz HPF (40 Hz being the lowest setting on Sound Devices 788T) with the other mic using the MZF 8000 ii’s 16Hz filter and the 788T’s 40 Hz HPF:

MKH 8030 on boom pole, with 40 Hz HPF on Sound Devices 788T to remove low-frequencies arising from handling noise.
Recorded simultaneously with the above, but recorded with a second MKH 8030 with the 16 Hz low-cut filter of the MZF 8000 ii plus a 40 Hz HPF on the Sound Devices 788T.

Again, as expected, the 16 Hz low-cut filter of the MZF 8000 ii adds significantly to reduction in handling noise from the boom pole by use of the recorder’s 40 Hz HPF.

For most such boom pole (or, indeed, pistol grip) mounting of a mic of course one would anticipate using a higher frequency HPF such as the switchable one built into the MZF 8000 ii, so that formed the next test: i.e. comparing the Sennheiser module with the 70 Hz HPF of the Sound Devices 788T.

MKH 8030 on boom pole, with 70 Hz HPF on Sound Devices 788T to remove low-frequencies arising from handling noise.
Recorded simultaneously with the above, but recorded with a second MKH 8030 with the 70 Hz HPF of the MZF 8000 ii.

Going by the frequency of the two HPFs some might expect that the results would be same, but the MZF 8000 ii’s 70 Hz filter has a much steeper slope (18 dB/oct) compared to that of the 788T (selectable at 6 dB/oct or 12 dB/oct: I used the latter), and this difference is clear. By contrast, the more recent Sound Devices 8-series and Mix-Pre recorders have 18 dB/oct HPFs, so the final test with the boom pole compared the MZF 8000 ii’s 70 Hz HPF to that of a MixPre-3: the latter only goes up in 20 Hz steps, so was set at 80 Hz.

MKH 8030 on boom pole, with 80 Hz HPF on Sound Devices MixPre-3 to remove low-frequencies arising from handling noise.
Recorded simultaneously with the above, but recorded with a second MKH 8030 with the 70 Hz HPF of the MZF 8000 ii.

Given the steepness of the slope and the slightly higher frequency, the MixPre-3 shows more attenuation of boom pole handling noise.

So far, this is all very much as expected from the specifications: but where does this leave us? What are the benefits of the MZF 8000 ii in terms of its HPF if the recorder/mixer has one too? And, likewise, what is the benefit of the -10dB pad if, as is sometimes the case (e.g. the 788T), the recorder can supply 48v phantom power in line-input mode to cope with mics recording very high SPLs and consequently producing high outputs? Well, this is complex, and will reflect the type of material being recorded, the modus operandi of the sound recordist, and the capability of the mixer/recorder. In some cases, stacking HPFs (i.e. in both the mic and the recorder/mixer) may be useful to give a steeper slope: this is especially relevant if the recorder itself doesn’t offer anything as steep as 18 dB/oct. In many uses the fixed 16 Hz HPF of the MZF 8000 ii will be useful to remove unwanted infrasound, and many mixer/recorders do not have HPF options that go this low. In some cases the MZF 8000 ii will stop the mixer/recorder preamps being overwhelmed by, or giving too much headroom to, unwanted low frequencies: this is especially relevant with those recorders (such as the Zoom F8n) where the HPF comes after the trim/gain and ADC. Of course, any such uses need to be balanced against the additional weight of the module (relevant at the end of a long boom pole) and the lack of accessibility of switches if the mic is in a windshield. And it also needs to be considered against other options that are outside the mic or the recorder/mixer, such as the switchable 80 Hz HPF built into the XLR mount of the Rycote Nano Shield (and therefore accessible outside a windshield).

So, in short, it will come down to personal choices: the module is primarily of use to those for whom mic handling noise, wind noise, unwanted low-frequency ambient noise, and, for the pad, extreme SPLs are issues, which will mainly comprise production/ENG sound, sound effects recording, and, to a lesser extent, field recording. As for using the MZF 8000 ii with the MKH 8030? Well, although this has a decent bottom end for a fig 8 mic, it naturally has less in the way of a low-frequency response than its omni, wide cardioid, cardioid and supercardioid siblings and is also less likely to be swung around vigorously on a boom than, say, the supercardioid MKH 8050. In short, to date I haven’t found a need to use the MZF 8000 ii with the fig 8 MKH 8030: others may draw different conclusions. However, I’ve found it useful to have the MZF 8000 ii in the kit, and so far have used it most with just the 16 Hz low-cut filter with the MKH 8020, where the very bottom of the extended low end of this omni mic isn’t always wanted: and its good to be able to have the 70 Hz (18 dB/oct) filter and the -10dB pad there for whenever the need arises. Turning this around the other way, and again unlike some others, I’m glad that with the MKH 8000 series mics Sennheiser took a modular view to the HPF and pad capabilities since, for the bulk of my recording activities (and I suspect those of so many others), they aren’t needed and the consequently more compact form is useful: evidently the MZL cables take that compactness further, but that’s another matter!

And just for a size comparison here is my MKH 50 alongside MKH 8050 with the MZF 8000 ii. The latter adds to the size of the MKH 8050, increasing its length to 103mm and its weight to 81g: these are significant increases of 39% and 47% respectively from the MKH 8050 just with its MZX 8000 XLR module, but still well short of the MKH 50’s 153mm length, 102g weight and, of course, greater diameter (25mm vs 19mm).