JL - 12W3v3-4 12inch 500W 4ohm Sub Woofer

W3v3: TechnologiesW3v3 Subwoofer DriversClearly the best sounding W3' s yet, these subwoofers feature DMA-optimized, long linear excursion capability to minimize distortion and increase output. W3v3' s are available in single 2 ohm, 4 ohm and 8 ohm versions (6W3v3 available in 4 ohm and 8 ohm only) and are superb performers at medium power levels in compact sealed or ported enclosures. Multiple patented technologies enhance performance and reliability. As with JL Audio' s flagship drivers, development was guided by JL Audio' s proprietary DMA (Dynamic Motor Analysis) modeling system to deliver outstanding dynamic stability and low-distortion operation within their intended power envelope. A mineral-filled polypropylene upper cone body with a metallic JL Audio logo medallion provides a classy new look, while a removable (and customizable) mounting flange trim ring receives grille-mesh inserts directly, without the need for additional grille hardware. (Grille mesh inserts are sold separately.) DMA Optimized Motor System

12W3v3 DRIVER SPECIFICATIONS Free Air Resonance (Fs): 26.72 HzElectrical Q (Qes): 0.472
Mechanical Q (Qms): 7.572
Total Speaker Q (Qts): 0.444
Equivalent Compliance (Vas): 2.844 cu. ft. / 80.54 liters
One-Way, Linear Excursion (Xmax)*: 0.510 in. / 13.0 mm
Reference Efficiency (no): 0.313%
Efficiency (1W/1m)**: 87.15 dB SPL
Effective Piston Area (Sd): 80.600 sq. in. / 0.0520 sq. m.
DC Resistance (Re): 3.563 ohm
Nominal Impedance (Znom): 4 ohm
Thermal Power Handling (Pt): 500W
Driver Displacement: 0.071 cu. ft. / 2.01 liters
Net Weight: 14.50 lbs. / 6.58 kg