Axiom Home Page Forums General Discussion Home Theater Major sub issues

An air gap isn't as good as material all the way to the wall. The only reason some products are designed to employ a gap is to have the sound pass through them twice. But if they were solid all the way to the wall they'd be even more effective. Just be less flexible in their installation and cost more.

The triangle into a corner has the largest volume for the smallest floor space. Instead of a full squared off soffit, picture a triangle which comes 2 ft across the ceiling and 2 ft down the wall. It shouldn't intrude too much.

That small of a trap won't do too much. When dealing with very small traps they need to be tuned exactly to the frequency you want to absorb, and make use of some advanced techniques like Helmholtz resonators. The reason the traps need to be big is because the wavelengths at these frequencies are that long. A 60 Hz sound wave peak to peak is 18.6 ft long.