Ground Zero GZPW 12SPL (2x1 Ohm)

12″ subwoofer · dual 1 Ω

Fs 47.7 HzQts 0.45Vas 0.53 ft³Xmax 0.89″

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 volume0.87 ft³ (24.5 L)
Qtc0.58
Fc60 Hz
F3 (−3 dB, no cabin gain)79 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 11 1/8″
Open sealed box in designer

Ported

Net volume1.52 ft³ (43 L)
Tuning (Fb)35 Hz
Portround port Ø2 1/2″, 5 5/16″ long
Port velocity at 300 W258 ft/s
F3 (−3 dB, no cabin gain)32 Hz
Example box (outside)21 5/8″ × 15 3/4″ × 11 1/4″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs47.7 Hz
Qts0.45
Qes0.49
Qms6.17
Vas0.53 ft³
Re (one coil)0.9 Ω
Sd78.7 in²
Xmax0.89″
Vd69.7 in³ calc.
Mms273 g calc.
BL12.3 T·m calc.
EBP97 — sealed or ported calc.
Sensitivity, 1 W / 1 m87.2 dB calc.

General

Size12″
Voice coilsdual 1 Ω
RMS power—

Mounting dimensions

Ø11 13/16″cutout Ø11 1/4″mounting depth 8 11/16″magnet Ø8 11/16″
Cutout diameter11 1/4″
Mounting depth8 11/16″
Overall diameter11 13/16″
Magnet diameter8 11/16″

Cone area (Sd) calculated from Fs, Vas and Mms: 78.7 in².

“≈” 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