Axiom Home Page Forums General Discussion Home Theater System is shipped as we speak (so to speak)

Insulation inside the walls will have next to no affect on the sound inside the room. It will turn some of the sound energy which would have normally escaped to the next room or outside into heat.

The surfaces in the room have the biggest influence over the mids to highs, and the dimensions of the room over the bass.

People say "sound absorption" material. But in most cases one doesn't want to absorb (that is capture and turn to heat) the mids and highs. What should be done is to treat the first reflection points with diffusers which prevent the reflections from reaching the ear only a split second after the direct radiation from the speakers (which causes a smearing in the sound), but doesn't remove the sound energy from the room.

Low frequency energy doesn't really reflect though, it more builds up in a room making it sound boomy. So in this case one does want to capture that excess. This is best done in the corners or at least where the floors or ceiling meet walls, this is where the greatest pressure build-ups can be tamed.

After all this is handled it is then much easier to clean up the rest with an EQ.