15" 600W RMS Dual 4 Ohm Voice Coil SE Series Subwoofer Electrical Q Value -Qes: 0.55 Mechanical Q Value -Qms: 4.3 Total Speaker Q Value -Qts: 0.49 Free Air Resonance -Fs: 22 Hz Equivalent Compliance -Vas: 209 liters One-Way, Linear Excursion -Xmax: 18 mm Efficiency -SPL 1W/1m: 88 dB SPL Effective Piston Area -SD: 810 cm^2 DC Resistance -Re: 2.8 ohm Force Factor -Bl: 17.7 Mounting Depth - 7.75"
