Hi Greg,
Yes you could stick a long hatpin right through the foam from one
side to the other. The foam block would be removable if you
carefully squashed it up a bit. It is shaped exactly like the nose
piece. The inner space behind the nose is quite hollow.
The hard plastic housing is in two colours: black and grey, with a
few screws that hold the pieces together.
I'm sure you could make one from lightweight marine ply and a block
of foam.
There should be plenty of SASS pictures in the archives (especially
on Walter Knapp's website) but if you need any pix I am happy to oblige!
cheers,
Vicki
On 15/03/2010, at 2:07 PM, Gregory O'Drobinak wrote:
> Thanks, Vicki!
>
> If what I understand about the block of foam in the middle is
> correct, if you had a long hat pin, could you pass it completely
> through from one side to the other? And is the foam block removable?
>
> You also mentioned about the black plastic housing, but what about
> the gray looking material that I see (on the data sheet) around the
> top, front and bottom of the foam block? Is it also a hard plastic
> or could it be permeable to sound?
>
> Thanks for your help!
>
> -Greg
>
>
>
>
>
> ________________________________
> From: vickipowys <>
> To:
> Sent: Sun, March 14, 2010 5:55:53 PM
> Subject: Re: [Nature Recordists] AT4022s in a baffled spaced array
> (was: FR-2LE & AT4022)
>
>
> Greg,
>
> For the nose of the SASS there is one big block of foam housed inside
> the plastic exterior, there is no metal edging but rather, plastic.
>
> The back surfaces are hard plastic, not coated with anything.
>
> Walt's design for where the mics are positioned I think closely
> follows the original Crown design, and mics are placed as close as
> physically possible to the edge between front and side panels. Which
> means the centre of a MKH 20 mic is just under 1 cm from the edge.
>
> The SASS body is quite lightweight, the plastic is only about 2.5 mm
> thick. The foam is not the super high-density stuff that is used in
> upholstery, but more like medium density foam, fairly squashy.
>
> How hard is the yoga block foam?
>
> Hope this helps!
>
> Vicki
>
> On 15/03/2010, at 8:36 AM, Gregory O'Drobinak wrote:
>
>> Rob & all:
>>
>> I'm trying to visualize how the "nose " of the SASS is actually
>> constructed. Is it really just a big block of foam delineated by
>> the metal edging, or is it a piece of foam of a certain thickness
>> applied to each side of the plastic nose barrier and then framed by
>> the metal edging? If the latter is true, how thick is the foam?
>>
>> As for the back surfaces where the PZM elements are affixed, are
>> they hard plastic or coated (like rubberized)?
>>
>> Also, does anyone have CAD drawings of the SASS housing?
>>
>> The final question revolves around the mounting point of the mic
>> faces in the non-PZM SASS rigs: How far is the center of each mic
>> from the intersection (the edge) of the back boundary and the nose
>> boundary? This could be a critical design parameter of its spacial
>> capturing since I believe that Crown's PZM elements are mounted
>> very close the that edge.Does anyone have the original version of
>> the SASS that had the B&K mics in place of the PZMs?
>>
>> Any more info about the SASS body would be most helpful as well. I
>> must say that I am quite intrigued by the sound of that design.
>>
>> John H> Do you have any recordings of your yoga block "SASS" rig?
>> How do feel it compares to just the plain rectangular block?
>>
>> Many thanks to all of you in starting this thread!!
>>
>> -Greg
>>
>>
>>
>>
>>
>>
>>
>> ____________ _________ _________ __
>> From: Rob Danielson <>
>> To: naturerecordists@ yahoogroups. com
>> Sent: Sat, March 13, 2010 4:52:39 PM
>> Subject: Re: [Nature Recordists] AT4022s in a baffled spaced array
>> (was: FR-2LE & AT4022)
>>
>>
>> At 7:21 PM +0000 3/13/10, hartogj wrote:
>>>
>>>
>>> Hello,
>>>
>>> I would say the SASS is a hybrid - a baffled boundary array.
>>>
>>> John Hartog
>>
>> Hi John--
>> Good point. Although Crown describes the foam as a "barrier," both
>> absorption and barrier functions appear to be present in the mass and
>> planes formed by the foam "nose." The metal wrapping around the nose
>> potentially creates some enclosure. With the capsules positioned at
>> the intersection of where the foam meets the hard boundary, there
>> could be some double-boundary effect, somehow. Multiple boundaries
>> were a hot idea at Crown around the time the SASS surfaced.
>> Surprisingly, SASS rigs are hollow enough to ring when thumped. A DIY
>> SASS with all the "magic" has remained elusive for everyone I've
>> known that has attempted it, but someone will surely figure the
>> design principles out.
>>
>> I'm hoping it will be instructive to better characterize what seems
>> to be a midrange lift in Paul's and Andrew's comparison. :-) Rob D.
>>
>> =3D =3D =3D
>>
>>>
>>> --- In
>>> <naturereco rdists%40yahoogr oups.com>naturereco rdists@
>>> yahoogroups. com,
>>> Rob Danielson <> wrote:
>>>>
>>>> Hi--
>>>> In interest of keeping our term usage somewhat consistent, I'm
>>>> pretty
>>>> sure that the wooden boundaries in David's rig would not be
>>>> technically described as "baffles." Baffles are used primarily to
>>>> absorb sound like the separator in a Jecklin Disk, and
>>>> boundaries are
>>>> designed to reflect sound or create a pressure zone. The SASS
>>>> and the
>>>> Curt's head-spaced arrays made of wood, are both "Boundary"
>>>> arrays.
>>>> The SASS uses the pressure zone formed on the boundary surface
>>>> with
>>>> flush mounted capsules. Curt's perpendicular to boundary capsule
>>>> mounting chiefly uses reflection. Rob D.
>>>>
>>>>>
>>>
>>>
>>
>> --
>>
>
>
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