The only thing thin about the L7T thin subwoofer is the mounting depth. Whether it’s on the road or trail, these tough subs work perfectly in nearly anything with a motor. The L7T 8-inch Subwoofer is a true-bass, thin subwoofer with a pair of 4 Ohm voice coils. With our custom SoloKon technology and the L7T’s unique interior support system, the sub sounds fat – but keeps it thin! Match any L7T thin sub with a KX-Series mono amplifier for an outstanding combination of power and size. Uses a Sealed or Ported Enclosure – Square Sub Design Moves 20% More Air Than Round Subwoofers – Easily Mounts Under or Behind a Seat – Dual Voice Coil Design – Ribbed Santoprene Surround Resists Heat And Degrading – Bumped Top Plate For More Excursion & Smoother Performance – SoloKon Cone With 360-Degree Back Bracing – UniPlate Solid Pole Piece & Backplate For Excellent Heat Dissipation – Durable Steel Basket The L7T 8-inch Subwoofer works best with a sealed or ported enclosure and 350 watts of recommended power. See below for more details. Size – 8″ (20 cm) – Rated Impedance – 4 Ohm DVC – Sensitivity – 84.835 1W, 1m – Max Power – 700 W – RMS Power – 350 W – Mounting Depth – 2 3/4″ (7 cm) – Mounting Square Cutout – 7 3/8 (18.8 cm) – Min Sealed Box – 0.2 cu. (5.66 L) – Max Sealed Box – 0.75 cu. (21.2 L) – Min Vented Box – 0.8 cu. (22.7 L) – Max Vented Box – 1.2 cu.