You can't have too many bass traps...

Right. Bass traps are worthless as tits on a bull. You need an intelligent room, subwoofers and digital bass management. The wavelengths are too long for anything the size of bass traps to do anything. All they do is absorb and redirect higher frequencies. If you decrease higher frequencies the bass becomes relatively louder. This give the illusion of more bass. Nice racket.

All of you who think you know what you are doing need to get yourselves a calibrated mic and impulse measurement program. Learn what is really happening rather than falling prey to myths and marketing.

Replaceablehead is pretty tuned in. That would be two puns for me today. I believe I am at my limit. Damp almost all reflections and the room is near flat.

Find the GFR in rayls/m3, or pa.s/m2 and match the thickness to the GFR. Use a calculator http://www.acousticmodelling.com/porous.php

"Get the rayls, use the calc, get the rayls, make them thick". Don’t guess, don’t use density kg/m3. Get the right figures. Thick is good.


Getting a suitable mic, small condenser, or proper measuring mic and using Room Eq Wizard is a good idea. But I would still say accurate GFR is the single most important thing to know. Room Eq Wizard graphs are hard to interpret and can make you feel hopeless. I’ve seen plenty of guys use Room Eq Wizard and then proceed to do a very poor job of treatment followed by another REW test that they interpret positively because they’re inexperienced and desperately want to see an improvement. If you get the rayls, use the calc, make ’em thick, and use plenty you should get good results.

And one last time, you cannot have too many, the only issue you’ll run into is having just enough to screw up the high end and not enough to tame the low end. Again, assuming you’re not trying to surgically target frequencies in an already pretty good room ie. an actual recording studio. If it’s a small room in your house, you need to take a deep breath, accept that you have limited options and make ’em thick son.

I disagree with mijostyn. I believe one should address room issues passively instead of adding more electronics be in the mix.