I have Real Traps minis and the 2' X 4' panels tighten up the bass when put diagonally in the corners behind the speakers. In my room, the corners behind the listener don't seem to have much effect. The minis do not screw up the mids and highs either. I had the mondos to try but liked just the minis better. The mondos were the Stereophile accessory/tweek of the year a couple years ago, however. Real Traps has no limit on how many minis you can put in the room at wall/ceiling/floor intersections. They claim you'll just keep getting better defined bass with added low frequencies the more you add. I'm not that crazy and my basement room with angled walls and ceiling (like a theater) sounds very nice (lively without clap echo--with great definition).
For a boomy room, what panels will reduce mid-bass
My listening room must have standing waves, because at my listening position there is too much mid-bass. It sounds bloated and the bass is just too pronounced. What acoustic devices are VERY good at reducing this boomy bass in the room? Panels on the wall would be nice, but I need something very effective.