Audio Pipe TS-PR12BL 12" Subwoofer and (2) Presonus Eris ES Powered Studio Speakers - Roller Auctions
How to Make a DIY Cylinder Subwoofer (aka Sonosub) - Spinditty
52.8mm x 52mm Speaker Port Tube Subwoofer Bass Reflex Tube Bass Woofer Box Port Vent - Walmart.com
Amazon.com: Speaker Port Tubes for Bass Enhancer, Subwoofer Air Ports Repalcement & DIY Parts 71mm x 102mm Speaker Cabinet Port Tube, 2-Pack(Black) : Electronics
Richardson Electronics - Checkout this awesome audio pipe subwoofer combo kit for just $499.99!! We love this setup so much even one of our employees run this in his personal car! Call