Various subwoofer designs
Audio cabinet. Use smaller gear oil drums as speaker boxes. Elevate to the height of the 55 gal drum and face speakers down.
Custom Speakers - PVC pipe sewer speakers that sound great!
An Audio Cassette Tape & Ruler Box by Sarah Sovereign, via Flickr- color combo
This boombox is made out of a car radio, salvaged speakers, and two 12V lead acid batteries. Plays for 9 hours continuously!
We love the way Hanson Audio Video in Dayton has used the recess in the wall to their advantage in framing out this big screen tv and speakers. #mancave http://www.hansonav.com
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