Model MF-15 D2 Type Subwoofer Size 15 inch Voice coil size 3.00 inch Cone Paper Magnet Ferrite Voice coil wire CCAW Surround Foam RMS Power 800 W MAX Power 1600 W Frame Steel Impedance 2+2 / 4+4 Ohm SPL 87.00 / 87.00 dB Fs 35.00 / 35.00 Hz Qts 0.74 / 0.78 BL 15.20 / 21.20 Vas 71.20 / 65.80 L Xmeh 30.00 / 30.00 mm Xmax 15.00 / 15.00 mm Mounting depth 7.17 inch (182.0 mm) Cut-out dimension 13.94 inch (354.0 mm) Gross weight 24.03 lb (10.90 kg)