JL AUDIO 10W0V2-4 (10W0V2) 10" 4-Ohm 300W SUBWOOFER Free Air Resonance (Fs): 32.09 Hz Electrical "Q" (Qes): 0.640 Mechanical "Q" (Qms): 10.752 Total Speaker "Q" (Qts): 0.604 Equivalent Compliance (Vas): 1.095 cu. ft. / 31.01 liters One-Way, Linear Excursion (Xmax) : 0.45 in. / 11.4 mm Reference Efficiency (no): 0.154% Efficiency (1W/1m) : 84.07 dB SPL Effective Piston Area (Sd): 48.909 sq. in. / 0.0316 sq. m. DC Resistance (Re): 4.280 ohm Nominal Impedance (Znom): 4 ohm Thermal Power Handling (Pt): 300W Driver Displacement: 0.034 cu. ft. / 0.96 litersSPECIFICATIONS Subwoofer Size : 10" Design : N/A Power Handling (RMS per Speaker) : 150 Watts Power Handling (MAX per Speaker) : 300 Watts Power Handling (Combined) MAX : N/A Sensitivity : 84dB Frequency Response : 25Hz~250Hz Impedance : 4-Ohms Mounting Depth : 4.9" Approximate Weight : 8.5 LBS