The KICKER SoloX L7X Ferrite Competition Subwoofer brings the most advanced bass technology and unprecedented performance, from the guys who invented it for a vehicle. A motor like no other – it includes a massive, triple-stacked ferrite magnet surrounding a hyper-extended pole piece, engineered for an enormous, more linear magnetic field and amazing heat dissipation. It's ultra-deep bass at very high volume. L7X's three-inch voice coil is supported by a dual-spider suspension system, and the double-pressed pulp cone is attached to an ultra-long-throw Santoprene surround - equipped with KICKER's square cone tech and ribbed corners for continuous force and air movement. Field-Replaceable Recone Kit - Using an exclusive, surround compression system, bolt-on spider landing, and helpful alignment shims, repairing an L7X is no sweat! Features: Field-Replaceable Recone Kit – cone/voice coil/spider assembly, and no gluing required Forced Air Cooling Three-inch, aluminum voice coil former Dual-spider suspension Double-pressed pulp cone Heavy-duty UV-resistant Santoprene surround Custom rubber magnet boot Cast-aluminum basket Single 8 AWG terminal and dual 8 AWG terminal block Triple-Stacked Ferrite Magnet Specifications: Size (in, cm) - 10, 25 Rated Impedance (Ohms) - 2 DVC Rec Amp Power rms - 1000-2000 Frequency Response - 25-100 Magnet Diameter (in, cm) - 8-11/16, 22 Total Magnet Weight (oz, kg) - 406, 11.5 Voice Coil Diameter (in, mm) - 3, 75 Voice Coil Winding Width (in, mm) - 2.5, 62.5 Top Plate Thickness (in, mm) - 0.5, 13 Xmax (in, mm) - 1.25, 31.25 Mounting Cutout (in, cm) - 9-5/16, 23.7 Mounting Depth (in, cm) - 9-7/16, 24 Recommended Vented Box Volume (Cu. Ft., L) - 2, 56.6 Port Opening (in x in, cm x cm) - 2.5 X 12.25, 6 X 31 Port Length (in, cm) - 38.5, 98 Vented Enclosure Tuning Frequency (Hz) - 31