Ultimate Support UA-BTB-24-2 - 12x12x24 Bass Corner Traps (Pair)Lets face it, most rooms were designed and built to house furniture and other box type things. All that squareness provides the perfect environment for the low frequencies from your mix, songwriting, or rehearsal to build up in the corners of your space. Ultimate Acoustics UA BTB 24 is a professional bass trap that reduces the effects of standing waves in your room controlling and absorbing all that nasty rumble that gets in the way of you hearing