Perry... My answer is yes, yes, yes.
True LF absorbers, devices purposefully constructed with a resonance frequency of 30 or 40Hz, are primary. They don't get attention at AC because they don't fit in conveniently mailable boxes from vendors lurking or contributing here. Throwing compromised trap and reflective absorbers about the room is secondary, with endless "cures". I was bothered by the fact there's little scientifically verified, available to order. You never know how good your secondary treatments work until the primary goal is met. I've admired your builds, if you look hard, I think you'll find your next. Think, heavy construction.
