JL Audio 8W1v3-4

8″ subwoofer · 4 Ω · 150 W RMS

Fs 35.4 HzQts 0.42Vas 0.68 ft³Xmax 0.31″

Recommended box

For a sedan, one sub, 150 W. It’s the same math as the designer’s step-by-step mode, where you can fit the box to your space, vehicle and amp and get plans, a cut sheet and DXF.

Sealed

Net volume0.28 ft³ (8 L)
Qtc0.77
Fc65 Hz
F3 (−3 dB, no cabin gain)64 Hz
Example box (outside)10 1/4″ × 10 1/4″ × 8 1/2″
Open sealed box in designer

Ported

Net volume0.85 ft³ (24 L)
Tuning (Fb)36 Hz
Port2 round ports Ø2 1/2″, 22 7/16″ long
Port velocity at 150 W62 ft/s
F3 (−3 dB, no cabin gain)34 Hz
Example box (outside)27 1/2″ × 15 3/4″ × 6 5/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs35.4 Hz
Qts0.42
Qes0.451
Qms5.79
Vas0.68 ft³
Re4.06 Ω
Sd32.7 in²
Xmax0.31″
Vd10.3 in³ calc.
Mms66 g calc.
BL11.5 T·m calc.
EBP78 — sealed or ported calc.
Sensitivity, 1 W / 1 m84.8 dB calc.

General

Size8″
Voice coils4 Ω
RMS power150 W

Mounting dimensions

Ø8 1/2″cutout Ø7 1/16″mounting depth 3 7/8″magnet Ø4 3/4″
Cutout diameter7 1/16″
Mounting depth3 7/8″
Overall diameter8 1/2″
Magnet diameter4 3/4″

“≈” means the value isn’t in the spec sheet and a typical value for the size is used; “calc.” means it’s calculated from the published parameters. Check the manufacturer’s spec sheet before you build.

Data sources

Other JL Audio 8″ models