JL Audio 12W3v3-8

12″ subwoofer · 8 Ω · 500 W RMS

Fs 28.3 HzQts 0.51Vas 2.73 ft³Xmax 0.51″

Recommended box

For a sedan, one sub, 500 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 volume1.84 ft³ (52 L)
Qtc0.81
Fc45 Hz
F3 (−3 dB, no cabin gain)42 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 9 3/16″
Open sealed box in designer

Ported

Net volume3.11 ft³ (88 L)
Tuning (Fb)31 Hz
Portslot 2 3/16 × 14 5/16″, 23 3/16″ long
Port velocity at 500 W61 ft/s
F3 (−3 dB, no cabin gain)28 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 16 3/8″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs28.3 Hz
Qts0.51
Qes0.553
Qms6.94
Vas2.73 ft³
Re7.31 Ω
Sd80.6 in²
Xmax0.51″
Vd41.3 in³ calc.
Mms157 g calc.
BL19.2 T·m calc.
EBP51 — sealed or ported calc.
Sensitivity, 1 W / 1 m87 dB calc.

General

Size12″
Voice coils8 Ω
RMS power500 W

Mounting dimensions

Ø12 1/2″cutout Ø11 1/16″mounting depth 6 5/8″magnet Ø5 1/2″
Cutout diameter11 1/16″
Mounting depth6 5/8″
Overall diameter12 1/2″
Magnet diameter5 1/2″

“≈” 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