Ground Zero GZTW 12F (2x2 Ohm)

12″ subwoofer · dual 2 Ω · 350 W RMS

Fs 35.1 HzQts 0.53Vas 1.88 ft³Xmax 0.63″

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 volume1.45 ft³ (41 L)
Qtc0.80
Fc53 Hz
F3 (−3 dB, no cabin gain)50 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 7 5/8″
Open sealed box in designer

Ported

Net volume3.25 ft³ (92 L)
Tuning (Fb)33 Hz
Portslot 1 15/16 × 14 5/16″, 16 15/16″ long
Port velocity at 350 W65 ft/s
F3 (−3 dB, no cabin gain)29 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 16 1/4″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs35.1 Hz
Qts0.53
Qes0.57
Qms7.49
Vas1.88 ft³
Re (one coil)2 Ω
Sd83.5 in²
Xmax0.63″
Vd52.6 in³ calc.
Mms159 g calc.
BL11.1 T·m calc.
EBP62 — sealed or ported calc.
Sensitivity, 1 W / 1 m88.1 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power350 W

Mounting dimensions

Ø12 5/16″cutout Ø11 3/16″mounting depth 3 7/8″magnet Ø6 11/16″
Cutout diameter11 3/16″
Mounting depth3 7/8″
Overall diameter12 5/16″
Magnet diameter6 11/16″

“≈” 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 Ground Zero 12″ models