How to Make a DIY Cylinder Subwoofer (aka Sonosub) - Spinditty
homemade subwoofer boxes for sale | Tacoma World
Holy Grail of Building A Successful Subwoofer DIY - thiswasmybest
Mini Earthquake - An 8" Cube of Bass - Toid's DIY Audio
PA of the Day - This is a a DIY subwoofer from 3RDKLTR soundsystem from Portland, Oregon USA. "THAM 15" design made out of 3/4 inch birch ply. 15" 8 ohm JBL
build my own subwoofer | DiyMobileAudio.com Car Stereo Forum