JBL Club 1224 (SSI set to 2 ohm)

12″ subwoofer · 2 Ω · 275 W RMS

Fs 31.9 HzQts 0.52Vas 2.16 ft³Xmax 0.41″

Recommended box

For a sedan, one sub, 275 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 volume1.62 ft³ (46 L)
Qtc0.80
Fc49 Hz
F3 (−3 dB, no cabin gain)46 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 18 11/16″
Open sealed box in designer

Ported

Net volume3.14 ft³ (89 L)
Tuning (Fb)32 Hz
Portslot 1 9/16 × 14 5/16″, 14 13/16″ long
Port velocity at 275 W64 ft/s
F3 (−3 dB, no cabin gain)29 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 15 7/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs31.9 Hz
Qts0.52
Qes0.59
Qms4.64
Vas2.16 ft³
Re2 Ω
Sd81 in²
Xmax0.41″
Vd32.9 in³ calc.
Mms157 g calc.
BL10.3 T·m calc.
EBP54 — sealed or ported calc.
Sensitivity, 1 W / 1 m87.3 dB calc.

General

Size12″
Voice coils2 Ω
RMS power275 W

Mounting dimensions

Ø12 15/16″cutout Ø11 1/4″mounting depth 6 1/2″magnet Ø≈ 7 5/16″
Cutout diameter11 1/4″
Mounting depth6 1/2″
Overall diameter12 15/16″

“≈” 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 JBL 12″ models