Freshly built ported common chamber subwoofer enclosure. Brand New 6&1/2 inch Lanzar MAXP64 installed in appropriate spec sub box. Each sub is 4ohm in stereo, bridged mono presents series 8ohm or parallel 2ohm to car audio amplifier amp. Lots of sound, capeable design, space saving, efficient bass, sub box. Also have a brand new pair of Skar EVL-65 dual 2ohm 6.5" subwoofers, for an additional $100