Ground Zero GZNW 12SPL (2x1 Ohm)

12″ subwoofer · dual 1 Ω

Fs 30.2 HzQts 0.38Vas 1.36 ft³Xmax 0.98″

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 volume0.83 ft³ (23.5 L)
Qtc0.62
Fc49 Hz
F3 (−3 dB, no cabin gain)59 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 10 3/4″
Open sealed box in designer

Ported

Net volume1.45 ft³ (41 L)
Tuning (Fb)32 Hz
Portround port Ø2 1/2″, 7 1/8″ long
Port velocity at 300 W217 ft/s
F3 (−3 dB, no cabin gain)31 Hz
Example box (outside)21 5/8″ × 15 3/4″ × 10 13/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs30.2 Hz
Qts0.38
Qes0.4
Qms8.74
Vas1.36 ft³
Re (one coil)≈ 0.85 Ω
Sd≈ 76 in²
Xmax0.98″
EBP76 — sealed or ported calc.
Sensitivity, 1 W / 1 m86.3 dB calc.

General

Size12″
Voice coilsdual 1 Ω
RMS power—

Mounting dimensions

Ø≈ 12 3/8″cutout Ø11 1/4″mounting depth 8 1/4″magnet Ø≈ 7 5/16″
Cutout diameter11 1/4″
Mounting depth8 1/4″

“≈” 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