Acoustic plus l+r wall different


New Member
Thread Starter
Aug 22, 2019
My AV System  
Preamp, Processor or Receiver
Denon 4400x
Universal / Blu-ray / CD Player
sony 6700
Front Speakers
Athena FS
Center Channel Speaker
Polk T30
Surround Speakers
Athena A1
(2) JBL PB10, HSU VTF3 MK3
Ok so I'm looking into making some acoustic panels. My first question is the insulation. I've seen ppl say OC 703 and watched a video with rockwool safe and sound. Curious on the safe and sound as it looks like 6 pieces 24x48 for 56 bucks but says for "interior walls and inside ceilings". Is this stuff ok to be in the open and breathed in. My other question is making them, I guess more due to the walls. My left wall is all paneling and my right wall consists of a bookshelf with doors under and then a fireplace followed by a panel wall. Do I make the panels for just my left side. I think this may muck up the acoustics. Curious on thoughts



Staff member
VIP Supporter
Apr 17, 2017
San Miguel de Allende Mexico
Supposedly the Rockwool is not as bad to breathe, but when we used Roxul rockwool for our last HT I still covered it with fabric on all sides. I do know that Roxul is easier to handle as I did not have any itching from installing it like I would with fiberglass.


May 27, 2019
Portland, Oregon, USA
You might put panels on the R wall also at the fireplace, to help prevent slap echo in the back of the room. Also, some treatment of bare walls on both sides behind the listening seat. Untreated parallel walls cause slap echo, which can make the sound more irritating.

Consider looking for plans for panels that incorporate sound diffusion or reflection, not just absorption. ASC uses a few mylar strips under the fabric of their panels to avoid over-absorption of high frequencies. GIK has a plate on the face of their Alpha line; RPG puts plates under the fabric of their BAD panels. The only time I ever felt I had overdone acoustic treatment was when I used a lot of purely absorptive panels. So while I'm not an expert on panel design, I think that is definitely something to consider.
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