Home Audio Acoustics

**PoorSignal** · **02-27-10, 03:52 AM**

How do you suggest I treat the front plane of the room? Picture included..

My speakers in the back are up high sideways facing towards each other, because I sit against the back wall

In that case is treating the front of the room still important?

**Matteo** · **02-27-10, 08:04 AM**

Nice Energy speakers. I have the same center in my Big TV room, but use the RC-70's. I think, but am not the expert, that it is "generally" a good idea to have a dampened front wall and a reverberant back wall. After that, you can treat your side walls as needed and the corners with bass traps. Unless you have a way to measure your room and the responses it yields, it might be hard to know exactly what you need.
Here is an interesting article. Has a lot of suggestions.
http://www.ethanwiner.com/acoustics.html

Matteo

**bpape** · **02-27-10, 08:18 AM**

I would agree on deading the front wall. I would also add that when you sit right against the rear wall, some thicker absorption behind you will be necessary to minimize the bass buildup and 'boom'.

Bryan

**PoorSignal** · **02-27-10, 12:03 PM**

Hi, more info, here is the sitting area and the red bean bag indicates where I most likely rest my head... (facing the center of screen and speaker).

I only have about 3" inch behind the sofa so I want to know what is the best material that could be the thinnest.

I found these 2.5" foam here, the specs seems OK, I mean it is not exactly bass trap.

http://www.sonexfoam.com/sonex_vlw.html

Would it work to use this or similar 2" material for maybe 6" the chair back and then transition to 4" panels?

I also found the reflection point of the front left channel using a mirror. The right channel is close to an upper cabinet so can't do much there.
I know the desk hutch is not helping any! but everything is a compromise.

I have a EMC8000 on the way so I can experiment a bit.

**bpape** · **02-28-10, 07:24 AM**

Well, the best thing to do is fix the problem. Move the seats away from the wall a few inches, or as much as you can.

Foam is about the worst solution in terms of performance. You're not going to get broadband bass control from 2" thickness no matter what - but 703 or 3lb cotton will do considerably better than foam.

Bryan

**PoorSignal** · **02-28-10, 12:43 PM**

If you were me and only have the time to work on one end right now, it would be the rear wall first right?

Also do I want to put a 4" bass trap on subwoofer first reflection point as well as the mains? What if I can only do first reflection point on the left side of the room?

**bpape** · **02-28-10, 12:57 PM**

Try to maintain symmetry left to right in terms of treatment - unless one side is already 'soft' and absorptive.

No need to do reflection points on the sub - they're everywhere as bass radiates spherically in 3 dimensions.

If it were me, I'd move the seating out a bit and kill the rear wall with some thing thick first.

Bryan

**PoorSignal** · **03-01-10, 03:09 PM**

For the front I could put in 2 pieces of 2" OC703 2'x4' starting about 1/3 from the bottom of the TV, up to the ceiling on each side, part of it tucked behind the TV, because I don't want to cover the light switch.

Then 1 piece 2x3 or 2x4 sideways above the TV. Basically the TV will be surrounded on the upper half.

Do you think that works for front treatment?

**bpape** · **03-01-10, 04:48 PM**

That should work OK to help with boundary reinforcement from the wall mounting and also to help tame surround reflections off the front wall.

Bryan

**tcarcio** · **03-02-10, 08:59 AM**

Brian, So your not supposed to treat the rear wall? I have two 2'x 4' panels of 703 right behind the listening position so should I use them elsewhere? I hope you don't mind me asking that here Jeremy.

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