Sorry! Gone already! I'm not using this anymore and I need to get it out of my house. It's an old Magnavox console stereo that I gutted and reinforced with 3/4" particle board. The whole thing is 1 1/2" thick throughout, braced and it is quite non-resonant. It is tuned to about 22Hz via two 4" ports that are vented through the bottom. I don't remember the internal volume anymore, but it's about 21x23x13" internal. Anyways, I live in Evanston, so if you would like it, just email me and we'll arrange for you to pick it up!