This is a PowerBass M-15D high-performance 800 watt 15 inch car audio subwoofer. Featuring a dual 4-ohm, 2.5" inch voice-coils this M-Series subwoofer can pound out an amazing 800 watts total power (400 watts RMS). Also featured, are large pro-lock terminals. These terminals enable you to wire this powerful sub with large gauge cables into a 4 or 2 ohm load. The advanced mineral-filled polypropylene cone, large-roll Santoprene foam surround, oversized 200 ounce motor assembly and black powder coated basket; allow this powerful subwoofer to produce more excursion without bottoming out and lower distortion. This equals deeper bass and higher SPL levels. This subwoofer is well-suited for both sealed or ported enclosures and other bass applications. You can use a mono amp, 2-channel or even a 4-channel amplifier to run this sub. Buy two and run a complete car/truck audio system!