JL Audio 8W3v3-4 8" Subwoofer - 4Ω

JL Audio 8W3v3-4 8" Subwoofer - 4Ω

If you need an 8-inch subwoofer that can create outstanding bass in extremely small enclosures, the 8W3v3 will do the job and surprise you with its power and accuracy. It employs the same technologies as its larger diameter brethren to deliver a whopping 0.375 in. (10 mm) of controlled, one-way, linear excursion.

The 8W3v3-4 is best used with amplifier power in the 75W - 250W range and is optimized to operate in a tiny 0.30 cu. ft. (8.5 l) sealed enclosure, or a 0.35 cu. ft. (9.9 l) ported enclosure. Detailed enclosure recommendations can be found in the "Specifications" tab.

Specifications

General Specifications
Continuous Power Handling (RMS): 250 W
Recommended Amplifier Power (RMS): 75- 250 W
Nominal Impedance (Znom): 4 Ω

Physical Specifications
Nominal Diameter: 8.0 in / 200 mm
Overall Diameter (A): 8.54 in / 217 mm
Mounting Hole Diameter (B): 7.09 in / 180 mm
Bolt Hole Circle Diameter (C): 7.85 in / 199 mm
Motor Outer Diameter (D): 4.75 in / 121 mm
Mounting Depth (E): 4.63 in / 118 mm
Driver Displacement: 0.03 cu ft / 0.85 L
Net Weight: 8.2 lb / 3.7 kg

Parameters
Free Air Resonance (Fs): 35.14 Hz
Electrical “Q” (Qes): 0.501
Mechanical “Q” (Qms): 7.071
Total Speaker “Q” (Qts): 0.467
Equivalent Compliance (Vas): 0.54 cu ft / 15.29 L
One-Way Linear Excursion (Xmax)*: 0.375 in / 10.0 mm
Reference Efficiency (no): 0.13%
Efficiency (1 W / 1 m)**: 83.24 dB SPL
Effective Piston Area (Sd): 32.02 sq in / 0.021 sq m
DC Resistance (Re): 3.77 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.): 0.30 cu ft / 8.5 L
External Width (W): 10 in / 254 mm
External Height (H): 10 in / 254 mm
External Depth (D): 9.5 in / 241 mm
F3: 54 Hz
Fc: 58.8 Hz
Qtc: 0.783

Ported Enclosure Specifications
Wall Thickness: 0.75 in / 19 mm
Front Baffle Thickness: 0.75 in / 19 mm
Volume (net int.): 0.35 cu ft / 9.9 L
External Width (W): 13 in / 330 mm
External Height (H): 10 in / 254 mm
External Depth (D): 9.25 in / 203 mm
Internal Port Diameter (ID): 2 in / 51 mm
Port Length (L): 18 in / 457 mm (round port requires a 90º elbow to fit in the specified enclosure)
Tuning Frequency (Fb): 35 Hz
F3: 41.0 Hz

Safety Notice
Prolonged exposure to sound pressure levels in excess of 100dB can cause permanent hearing loss. This high-performance speaker can exceed this level. Please exercise restraint in its operation in order to preserve your ability to enjoy its fidelity.

When installing a subwoofer in your vehicle, it is extremely important to secure the enclosure firmly. We recommend bolting the enclosure through the metal of the floorpan or the frame of the vehicle with large diameter washers for reinforcement. If an enclosure is not firmly attached, it can become a projectile in a collision. This is particularly important in a hatchback, station wagon, sports utility vehicle, or van.