12 15 Obsidian Audio subwoofers on a Digital Design m4a amplifier jakes bad ass ground pounder

12 15 Obsidian Audio subwoofers on a Digital Design m4a amplifier XS power batteries, Mb quart highs amp, jakes bad ass ground pounder giving out some demos connor dunn crawled in the box, hope i get a chance to crawl back there next show with even more power on it Db drag show in west bend wisconsin aug 2012 check out his channel and subscribe