Ground Zero GZHW 30SPL (2x1 Ohm)

12″ subwoofer · dual 1 Ω · 1,500 W RMS

Fs 35.4 HzQts 0.44Vas 0.56 ft³Xmax 0.89″

Recommended box

For a sedan, one sub, 1,500 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 volume0.72 ft³ (20.5 L)
Qtc0.59
Fc47 Hz
F3 (−3 dB, no cabin gain)60 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 10 1/4″
Open sealed box in designer

Ported

Net volume1.38 ft³ (39 L)
Tuning (Fb)28 Hz
Port2 round ports Ø2 1/2″, 22 7/8″ long
Port velocity at 1,500 W245 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)24 1/8″ × 15 3/4″ × 10 1/4″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs35.4 Hz
Qts0.44
Qes0.48
Qms5.54
Vas0.56 ft³
Re (one coil)1 Ω
Sd72.4 in²
Xmax0.89″
Vd64.1 in³ calc.
Mms395 g calc.
BL13.5 T·m calc.
EBP74 — sealed or ported calc.
Sensitivity, 1 W / 1 m83.6 dB calc.

General

Size12″
Voice coilsdual 1 Ω
RMS power1,500 W

Mounting dimensions

Ø12 3/8″cutout Ø11 3/16″mounting depth 7 13/16″magnet Ø7 1/2″
Cutout diameter11 3/16″
Mounting depth7 13/16″
Overall diameter12 3/8″
Magnet diameter7 1/2″

Cone area (Sd) calculated from Fs, Vas and Mms: 72.4 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