JBL Selenium 12SWMS350

12″ subwoofer · 4 Ω · 350 W RMS

Fs 36 HzQts 0.94Vas 3.57 ft³Xmax 0.31″

Recommended box

For a sedan, one sub, 350 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)
Qtc1.61
Fc62 Hz
F3 (−3 dB, no cabin gain)44 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)48 Hz
Portslot 1 3/4 × 14 5/16″, 5 5/16″ long
Port velocity at 350 W64 ft/s
F3 (−3 dB, no cabin gain)41 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 14 11/16″
Open ported box in designer
2030405060801001502007278849096102HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs36 Hz
Qts0.94
Qes1.12
Qms5.88
Vas3.57 ft³
Re3.3 Ω
Sd80.6 in²
Xmax0.31″
Vd25.4 in³ calc.
Mms74 g calc.
BL7 T·m calc.
EBP32 — suits sealed calc.
Sensitivity, 1 W / 1 m88.2 dB calc.

General

Size12″
Voice coils4 Ω
RMS power350 W

Mounting dimensions

Ø≈ 12 5/16″cutout ≈ Ø11 1/8″mounting depth ≈ 5 7/8″magnet Ø≈ 7 3/16″
Cutout diameter≈ 11 1/8″
Mounting depth≈ 5 7/8″

“≈” 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 Selenium 12″ models