JL Audio 12W1v3-4

12″ subwoofer · 4 Ω · 300 W RMS

Fs 26.2 HzQts 0.50Vas 2.71 ft³Xmax 0.45″

Recommended box

For a sedan, one sub, 300 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 volume1.77 ft³ (50 L)
Qtc0.80
Fc42 Hz
F3 (−3 dB, no cabin gain)39 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 8 15/16″
Open sealed box in designer

Ported

Net volume3.14 ft³ (89 L)
Tuning (Fb)29 Hz
Portslot 1 9/16 × 14 5/16″, 18 7/8″ long
Port velocity at 300 W65 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 15 3/4″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs26.2 Hz
Qts0.50
Qes0.535
Qms8.2
Vas2.71 ft³
Re3.92 Ω
Sd81.4 in²
Xmax0.45″
Vd36.5 in³ calc.
Mms188 g calc.
BL15.1 T·m calc.
EBP49 — suits sealed calc.
Sensitivity, 1 W / 1 m86.1 dB calc.

General

Size12″
Voice coils4 Ω
RMS power300 W

Mounting dimensions

Ø12 1/2″cutout Ø11 1/16″mounting depth 5 3/8″magnet Ø5 1/4″
Cutout diameter11 1/16″
Mounting depth5 3/8″
Overall diameter12 1/2″
Magnet diameter5 1/4″

“≈” 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 12″ models