4) New PLANET AUDIO AC12D 12" 7200W Car Audio Power Subwoofers Subs Woofers DVC Planet Audio AC12D 12" 1800 Watt Dual 4-OHM Car Subwoofer RMS Power: 900 Watts Peak Power: 1800 Watts Sensitivity (1W/1m): 88 dB Mounting Depth: 5.375"