Ground Zero GZRW 30XSPL-D2 (2x2 Ohm)

12″ subwoofer · dual 2 Ω · 1,000 W RMS

Fs 36.1 HzQts 0.59Vas 0.81 ft³Xmax 0.49″

Recommended box

For a sedan, one sub, 1,000 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 volume0.95 ft³ (27 L)
Qtc0.80
Fc49 Hz
F3 (−3 dB, no cabin gain)46 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 12 11/16″
Open sealed box in designer

Ported

Net volume2.68 ft³ (76 L)
Tuning (Fb)27 Hz
Portslot 2 15/16 × 14 5/16″, 52 7/16″ long
Port velocity at 1,000 W62 ft/s
F3 (−3 dB, no cabin gain)24 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 18 3/4″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs36.1 Hz
Qts0.59
Qes0.667
Qms5.14
Vas0.81 ft³
Re (one coil)1.83 Ω
Sd77.3 in²
Xmax0.49″
Vd38 in³ calc.
Mms298 g calc.
BL13.6 T·m calc.
EBP54 — sealed or ported calc.
Sensitivity, 1 W / 1 m84.1 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power1,000 W

Mounting dimensions

Ø12 5/8″cutout Ø11 1/8″mounting depth 6 1/4″magnet Ø6 7/8″
Cutout diameter11 1/8″
Mounting depth6 1/4″
Overall diameter12 5/8″
Magnet diameter6 7/8″

Cone area (Sd) calculated from Fs, Vas and Mms: 77.3 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