Home Room Acoustics Forum by Rives Audio

Welcome! Need support, you got it. Or share you ideas and experiences.

Re: Help with my listening room

I agree with Rives earlier post. Trying to put bass absorbers in a concrete room is expensive and ineffective, especially any form of fiberglass as a bass absorber. You can easily improve mid to high frequencies with all kinds of acoustical materials but you just can't get down to those frequencies where room modes (your case ~36Hz, ~56Hz, ~72Hz, etc) dominate except if....

You construct 2X wood and sheetrock walls over the concrete. 1/2" sheetrock on 2"X(4-6") wood with fiberglass in the wall/ceiling cavities will reduce the "Q" of the room modes. You'd need to do all the walls because you need as much surface area as possible to absorb low frequency energy.

If you're willing to do that then you can also make your ceiling height more room mode friendly by changing it's height (lots of speadsheets and programs to help with the exact height) and making it of the same construction as the walls.

You'd still would need to be careful on seating and speaker locations but now you'd be able to add surface treatments to correct for "regular" room problems as you indicated you already know about.

Last comment: Don't add too much fiberglass to the room. Small rooms can sound dead when fiberglass is used as the primarey form of room treatment.


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