Ground Zero GZRW 25-D2 (2x2 Ohm)

10″ subwoofer · dual 2 Ω · 600 W RMS

Fs 26.3 HzQts 0.54Vas 1.00 ft³Xmax 1.97″

Recommended box

For a sedan, one sub, 600 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 volume0.85 ft³ (24 L)
Qtc0.80
Fc39 Hz
F3 (−3 dB, no cabin gain)37 Hz
Example box (outside)12 3/16″ × 12 3/16″ × 14 15/16″
Open sealed box in designer

Ported

Net volume2.05 ft³ (58 L)
Tuning (Fb)25 Hz
Portslot 1 3/4 × 14 5/16″, 48 7/8″ long
Port velocity at 600 W66 ft/s
F3 (−3 dB, no cabin gain)22 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 13 3/4″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs26.3 Hz
Qts0.54
Qes0.593
Qms6
Vas1.00 ft³
Re (one coil)≈ 1.7 Ω
Sd≈ 52.7 in²
Xmax1.97″
EBP44 — suits sealed calc.
Sensitivity, 1 W / 1 m81.4 dB calc.

General

Size10″
Voice coilsdual 2 Ω
RMS power600 W

Mounting dimensions

Ø≈ 10 3/16″cutout Ø9″mounting depth 5 15/16″magnet Ø≈ 5 13/16″
Cutout diameter9″
Mounting depth5 15/16″

Only Qts is published — Qms assumed to be 6 and Qes calculated (barely affects box design).

“≈” 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 10″ models