Harmony Audio HA-R124 Car Stereo Rhythm 12" Sub 600W Single 4 Ohm Subwoofer New Harmony Audio HA-R124 Car Stereo Rhythm Series 12" Sub 600W Single 4 Ohm Subwoofer. The greatest enemy of a car audio subwoofer is heat which needs to be quickly dissipated for a sub perform correctly and is crucial to prolong the life of the subwoofer.
eBay