1200 Watts SPL 12″ high quality flat SPL subwoofer with alumiunum cast basket 12″ high quality flat SPL subwoofer Klippel® optimized Sandwich paper cone Durable U-shape rubber surround Solid aluminum cast basket 63 mm / 2.5″ copper voice coil 4-layer copper voice coil Push terminal Model High-Quality Flat SPL Subwoofer Diameter 30 cm / 12″ Power handling (RMS/SPL) 700 / 1200 Watts Impedance 2x 2 Ohms Efficiency 88 dB Power recommendation 500 – 1200 Watts Voice coil 63 mm / 2.5″ Copper Cone Sandwich paper Max. Excursion (Xmax) 32 mm / 1.26″ Mounting Ø 284 mm / 11.18″ Mounting depth 118 mm / 4.65″ Resonance frequency (Fs) 21 Hz Overall quality (Qts) 0.30 Equiv. air volume (Vas) 19.7 L / 4.15 ft³