I am selling a used Velodyne CHT-8 subwoofer. It is in perfect condition. I may have original box (I think it's in my mother's house) Here are reviews: http://www.audioreview.com/mfr/velodyne-acoustics/subwoofers/PRD_286736_2741crx.aspx Here is a pdf of the manual: http://www.velodyne.com/velodyne/products/manuals/CHT-8_CHT-12.pdf I am asking $135 for local pickup in Minneapolis, MN will ship if no local interest