Ground Zero GZRW 12XSPL (2x2 Ohm)

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

Fs 31.8 HzQts 0.68Vas 0.96 ft³Xmax 1.77″

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 volume1.77 ft³ (50 L)
Qtc0.85
Fc40 Hz
F3 (−3 dB, no cabin gain)35 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 20 1/8″
Open sealed box in designer

Ported

Net volume3.00 ft³ (85 L)
Tuning (Fb)26 Hz
Portslot 2 15/16 × 14 5/16″, 50 3/8″ long
Port velocity at 1,000 W64 ft/s
F3 (−3 dB, no cabin gain)22 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 19 3/4″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs31.8 Hz
Qts0.68
Qes0.758
Qms7
Vas0.96 ft³
Re (one coil)1.95 Ω
Sd77.9 in²
Xmax1.77″
Vd137.9 in³ calc.
Mms329 g calc.
BL13 T·m calc.
EBP42 — suits sealed calc.
Sensitivity, 1 W / 1 m82.6 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power1,000 W

Mounting dimensions

Ø12 1/4″cutout Ø11 5/16″mounting depth 6 9/16″magnet Ø7 1/2″
Cutout diameter11 5/16″
Mounting depth6 9/16″
Overall diameter12 1/4″
Magnet diameter7 1/2″

“≈” 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