JBL GTO1202D

12″ subwoofer · dual 2 Ω · 300 W RMS

Fs 23.5 HzQts 0.44Vas 3.45 ft³Xmax 0.49″

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 volume1.52 ft³ (43 L)
Qtc0.80
Fc43 Hz
F3 (−3 dB, no cabin gain)41 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 7 15/16″
Open sealed box in designer

Ported

Net volume3.18 ft³ (90 L)
Tuning (Fb)28 Hz
Portslot 1 9/16 × 14 5/16″, 20 5/16″ long
Port velocity at 300 W64 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs23.5 Hz
Qts0.44
Qes0.47
Qms7.14
Vas3.45 ft³
Re (one coil)2 Ω
Sd82.5 in²
Xmax0.49″
Vd40.6 in³ calc.
Mms188 g calc.
BL10.9 T·m calc.
EBP50 — sealed or ported calc.
Sensitivity, 1 W / 1 m86.3 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power300 W

Mounting dimensions

Ø12 7/16″cutout Ø11 3/16″mounting depth 5 1/16″magnet Ø≈ 7 1/4″
Cutout diameter11 3/16″
Mounting depth5 1/16″
Overall diameter12 7/16″

“≈” 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