With a unique square design that moves more air to produce deeper, more powerful bass, the Kicker L7R 10-Inch 1000-Watt Max 4-Ohm DVC Square Subwoofer was built to pack serious sound into every square inch. This dual voice coil subwoofer features 4 ohms of impedance, 1,000 watts of max power, and 500 watts of RMS power. It features an injection-molded SoloKon woofer design, UniPlate back plate and pole piece, nickel-plated speaker terminals, and 360-degree back bracing with a bumped back plate and steel basket. This 10-inch square subwoofer has a mounting depth of 6.125 inches and a cutout diameter of 9.315 inches. It's recommended in sealed boxes with between 0.66 and 1 cubic feet of air space, and in vented boxes with between 1.25 and 2.25 cubic feet.