4) New PYRAMID PW677X 1200W 6" Car Audio Subs/Subwoofers Power Woofers Stereo New Pyramid PW677X 6" 1200 Watt Car Subwoofers (4 pack) 1200 Watt Total Max Power Handling (300 Watt Each Sub) 600 Watt Total RMS Power (150 Watt Each Sub) Impedance: 4 Ohm SPL (1W/1M): 86dB