Soffits and broadband absorbers

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Soffits and broadband absorbers

Postby Andrew Steel » Wed Mar 03, 2004 9:35 pm

Hi All,
Has anyone thought of, or tried making corner absorbers of 703 that are wider than a sheet, and placing the monitors in a cut out in them? The monitor would need to be mounted on a shelf that let it poke through the hole in the 703. The space behing the 703 could be filled if desired. This way there are 2 very deep broadband absorbers in the front of the room and the step response of the monitor is not affected by the soffit. No reflections or diffraction from the front corners. Any ideas or comments?

Andrew Steel
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Postby Ido » Thu Mar 04, 2004 7:31 pm

Really depends if your talking nearfields, or big buggers(far fields) behind.
For the big ones this is known and used.
For nearfields, it depends on individual room dimensions,
usually won't be suitable, but I suggest this:
Do all of the front wall deeply absorb.,
or a big segment of it from corner to corner,
and plant the speakers where suitable.
It won't be that much more work, better all out acoustics, etc.
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Postby Bob » Thu Mar 04, 2004 11:10 pm

There's a thread here a little while back about putting speakers in the middle of a bunch of diffusers (not absorbers).

For a picture have a look at
about three quarters of the way down.

That thread is

Since these are absorbers and not diffusers, I'd guess you'd use in-room monitors instead of in-wall monitors.
Bob Golds
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Postby Paul Woodlock » Fri Mar 05, 2004 3:03 am


Goto and search for info on soffit mounting. Great advice on that site :)

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Postby Andrew Steel » Fri Mar 05, 2004 10:36 pm

Thnaks guys,
I just wondered if the walls that the monitors are soffit mounted in are made of say 703, then the diffraction effects are minimal, the step response doesnt change and no shelving eq is needed and the space behind becomes a very deep broadband absorber. Maybe I should try it and see.

Andrew Steel
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Location: Brisbane Australia

Postby Scott R. Foster » Fri Mar 05, 2004 11:40 pm

Pics or it didn't happen.
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Postby Dan Nelson » Sat Mar 06, 2004 5:33 am

The page on the genelec site that paul talked about.

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