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Questions/recommendations regarding DIY wall absorbers?!

Posted: Thu Feb 03, 2005 6:36 am
by Paul.E
Hello everyone, I have recently gotten a room emptied out at home to use specifically for music production. However, this room is very, very small. The dimensions are laughable at 8' long x 8' wide x 7.X' high. Unfortunately that is all I have to work with. Now, I feel the need to construct some wall mounted (hangable) absorbers at key points in the room. These may compliment the Primacoustic Europa kit I MAY purchace for the wall behind the two monitors.

I've done some reading on this site regarding the DIY absorbers many of you have built and I find it very easy, cheap and effective for my needs. Howerver, most of you build these panels very thick, too thick for my space. Anything more than 2" thick will be enough to "cramp" my workspace. What I'd like to know is which DIY kit should I base myself on for my room? Keep in mind I would prefer not having a panel from the ground up and also that I intend on covering up the panels with cloth for esthetics. I am also located in Canada for those of you who may provide me with name brands.


Thanks in advance,

Paul Evangeliou.

Posted: Thu Feb 03, 2005 8:20 am
by z60611
Here's where I'd start, based on some guesses:
Your room volume is 8'x8'x7.5' = 480 ft^3
For a control room (ITU formula) I think that works out to RT60=0.13
So, if I have my math right again (sabines = (0.049 * volume-in-cubic-feet) / RT60), you want 183 sabines at each frequency.
That's about 3 walls (each 8'x8' = 64ft^2, times 3 = 192 ft^2) covered with 4" of 703/RXL40 mounted 4" out from the wall.
Although you probably would be better spreading the 183 ft^2 feet around the room a bit (i.e. not actually just on three walls - some on the ceiling and rear wall -- all the front wall covered though).
This assumes there's no other absorbtion in the room (chairs, carpet).
Yea, I know, that turns it into a 7.3'x7.3'x7' room.

If you want a live room, then you want less than this.

Posted: Sat Feb 05, 2005 12:04 pm
by Jon Best
I have always recommended, for little rooms, Ethan's old high and low bass panel absorbers, basically all the way around all the walls, and on the ceiling if you can stand it. Then, hang 704 a couple inches off for the front 3/5 of the side walls, the entire front wall, the ceiling from the front to about halfway back, and at least the middle if not the entire back wall. 703 at 45 degree angles across any corners that can stand it. Live floor. Diffusion on the sidewalls near the back. That should even out the bottom as much as possible in such a small room, and still be just live enough to not feel like your brains are getting sucked out of your ears.