-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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