$70 dollar 6.5" driver and a sheet of plywood. 7" wide Would be a great two channel sub or even a HT sub for a smaller room. http://www.avsforum.com/avs-vb/showthread.php?t=1238398 I'm probably going to build one to replace the Tuba HT. Edit: ok, just bought one. I still have a sheet of ply left over so I'll only be out the $70.