Ground Zero GZNW 12XSPL (2x1 Ohm)

12″ subwoofer · dual 1 Ω

Fs 38.1 HzQts 0.41Vas 0.91 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)
Qtc0.59
Fc55 Hz
F3 (−3 dB, no cabin gain)70 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 11 3/8″
Open sealed box in designer

Ported

Net volume1.48 ft³ (42 L)
Tuning (Fb)34 Hz
Portround port Ø2 1/2″, 5 15/16″ long
Port velocity at 300 W236 ft/s
F3 (−3 dB, no cabin gain)32 Hz
Example box (outside)20 13/16″ × 15 3/4″ × 11 7/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs38.1 Hz
Qts0.41
Qes0.45
Qms4.76
Vas0.91 ft³
Re (one coil)1.2 Ω
Sd76.9 in²
Xmax0.98″
Vd75.7 in³ calc.
Mms237 g calc.
BL12.3 T·m calc.
EBP85 — sealed or ported calc.
Sensitivity, 1 W / 1 m87 dB calc.

General

Size12″
Voice coilsdual 1 Ω
RMS power—

Mounting dimensions

Ø12 3/8″cutout Ø11 3/16″mounting depth 8 7/8″magnet Ø≈ 7 1/4″
Cutout diameter11 3/16″
Mounting depth8 7/8″
Overall diameter12 3/8″

Cone area (Sd) calculated from Fs, Vas and Mms: 76.9 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