JL AUDIO (13W3V3-4) 13.5-INCH SUBWOOFER DRIVER (600W, 4 OHM) OVERVIEW: If you have the space, it makes a tremendous sense to maximize your subwoofer system's piston area to enhance efficiency (and output). It gets even better when the larger driver delivers additional power handling and excursion. For the preceding reasons, the 13W3v3 can be the best choice for those seeking high output with great sound quality at medium power levels. As with the smaller W3v3's, several exclusive JL Audio technologies and proprietary assembly techniques are applied to the 13W3v3 to enhance linearity and reliability. The 13W3v3-4 is best used with amplifier power in the 150W - 600W range and is optimized to operate in a moderate size 1.5 cu. ft. (42.5 l) sealed enclosure, or a 2.25 cu. ft. (63.7 l) ported enclosure. Detailed enclosure recommendations can be found in the "Specifications" tab. GENERAL SPECIFICATIONS: Continuous Power Handling (RMS) : 600 W Recommended Amplifier Power (RMS) : 150 - 600 W Nominal Impedance (Znom) : 4 Ω PHYSICAL SPECIFICATIONS: Nominal Diameter : 13.5 in / 345 mm Overall Diameter (A) : 14.0 in / 356 mm Mounting Hole Diameter (B) : 12.5625 in / 319 mm Bolt Hole Circle Diameter (C) : 13.2 in / 335 mm Motor Outer Diameter (D) : 5.79 in / 147 mm Mounting Depth (E) : 7.63 in / 194 mm Driver Displacement : 0.096 cu ft / 2.72 liters Net Weight : 17.75 lb / 8.05 kg PARAMETERS: Free Air Resonance (Fs) : 23.66 Hz Electrical “Q” (Qes) : 0.465 Mechanical “Q” (Qms) : 6.774 Total Speaker “Q” (Qts) : 0.435 Equivalent Compliance (Vas) : 4.793 cu ft / 135.74 L One-Way Linear Excursion (Xmax)* : 0.610 in / 15.5 mm Reference Efficiency (no) : 0.37% Efficiency (1 W / 1 m)** : 87.90 dB SPL Effective Piston Area (Sd) : 103.850 sq in / 0.0670 sq m DC Resistance (Re) : 3.569 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.) : 1.500 cu ft / 42.5 L External Width (W) : 16 in / 406 mm External Height (H) : 16 in / 406 mm External Depth (D) : 14.625 in / 371 mm F3 : 40.4 Hz FC : 48.5 Hz Qtc : 0.89 PORTED ENCLOSURE SPECIFICATIONS: Wall Thickness : 0.75 in / 19 mm Front Baffle Thickness : 0.75 in / 19 mm Volume (net int.) : 2.25 cu ft / 63.7 L External Width (W) : 21.75 in / 552 mm External Height (H) : 17 in / 432 mm External Depth (D) : 18 in / 457 mm Internal Slot Port Width (SW) : 1.5 in / 38 mm Internal Slot Port Height (SH) : 15.5 in / 394 mm Internal Slot Port Length (SL) : 34.375 in / 873 mm Port Extension Length (EL) : 15.625 in / 397 mm Tuning Frequency (Fb) : 27 Hz F3 : 35 Hz In-Store Purchase only SKU # 92157