JL Audio 12W3v3-4 12" Subwoofer

JL Audio 12W3v3-4 12" Subwoofer Overview This powerhouse 12-inch driver delivers potent performance and world-class sound quality in medium power applications. Several exclusive JL Audio technologies and proprietary assembly techniques are applied to the 12W3v3 to enhance linearity and reliability. The 12W3v3-4 is best used with amplifier power in the 150W - 500W range and is optimized to operate in a compact 1.125 cu. ft. (31.8 l) sealed enclosure, or a 1.75 cu. ft. (49.6 l) ported enclosure. General Specifications Continuous Power Handling (RMS) 500 W Recommended Amplifier Power (RMS) 150 - 500 W Nominal Impedance (Znom) 4 Ω Physical Specifications Nominal Diameter 12.0 in / 300 mm Overall Diameter (A) 12.5 in / 318 mm Mounting Hole Diameter (B) 11.0625 in / 281 mm Bolt Hole Circle Diameter (C) 11.7 in / 297 mm Motor Outer Diameter (D) 5.5 in / 140 mm Mounting Depth (E) 6.65 in / 169 mm Driver Displacement 0.071 cu ft / 2.01 L Net Weight 14.50 lb / 6.58 kg Parameters Free Air Resonance (Fs) 26.72 Hz Electrical “Q” (Qes) 0.472 Mechanical “Q” (Qms) 7.572 Total Speaker “Q” (Qts) 0.444 Equivalent Compliance (Vas) 2.844 cu ft / 80.54 L One-Way Linear Excursion (Xmax)* 0.510 in / 13.0 mm Reference Efficiency (no) 0.31% Efficiency (1 W / 1 m)** 87.15 dB SPL Effective Piston Area (Sd) 80.600 sq in / 0.0520 sq m DC Resistance (Re) 3.563 Ω * Xmax specifications are derived via one-way voice coil overhang method with no correction factors applied. ** Efficiency (1 W / 1 m) is not an accurate indicator of a subwoofer’s output capability and should not be used as a comparison to other subwoofers to determine which one is “louder”. Sealed Enclosure Specifications Wall Thickness 0.75 in / 19 mm Front Baffle Thickness 0.75 in / 19 mm Volume (net int.) 1.125 cu ft / 31.8 L External Width (W) 21 in / 533 mm External Height (H) 14 in / 356 mm External Depth (D) 10 in / 254 mm F3 43.7 Hz Fc 50.2 Hz Qtc 0.83 Ported Enclosure Specifications Wall Thickness 0.75 in / 19 mm Front Baffle Thickness 0.75 in / 19 mm Volume (net int.) 1.75 cu ft / 49.6 L External Width (W) 29 in / 737 mm External Height (H) 14 in / 356 mm External Depth (D) 12.625 in / 321 mm Internal Slot Port Width (SW) 1.375 in / 35 mm Internal Slot Port Height (SH) 12.5 in / 318 mm Internal Slot Port Length (SL) 26.8125 in / 681 mm Port Extension Length (EL) 13.5 in / 343 mm Tuning Frequency (Fb) 30 Hz F3 35 Hz