Quote:
The problem, as Fred mentioned, is that simple absorption of sound by fiber glass or similar insulation material isn't very efficient at very low frequencies.

The corner traps will be quite effective down to about 100Hz. John. Have you seen any designs for resonant membrane absorbers? I did a LOT of research on this topic a while back and was never able to find any sort of design principle to follow.

In the end, I bought a Behringer feedback destroyer to clean up my bass between 20 and 100 Hz.

Fred

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Blujays1: Spending Fred's money one bottle at a time, no two... Oh crap!