Ground Zero GZRW 25XSPL-D2 (2x2 Ohm)

10″ subwoofer · dual 2 Ω

Fs 44.8 HzQts 0.64Vas 0.81 ft³Xmax 0.43″

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 volume1.20 ft³ (34 L)
Qtc0.83
Fc58 Hz
F3 (−3 dB, no cabin gain)52 Hz
Example box (outside)12 3/16″ × 12 3/16″ × 20 3/16″
Open sealed box in designer

Ported

Net volume2.05 ft³ (58 L)
Tuning (Fb)37 Hz
Portslot 1 9/16 × 14 5/16″, 17 9/16″ long
Port velocity at 300 W63 ft/s
F3 (−3 dB, no cabin gain)32 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 11 1/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs44.8 Hz
Qts0.64
Qes0.72
Qms6
Vas0.81 ft³
Re (one coil)≈ 1.7 Ω
Sd≈ 52.7 in²
Xmax0.43″
EBP62 — sealed or ported calc.
Sensitivity, 1 W / 1 m86.6 dB calc.

General

Size10″
Voice coilsdual 2 Ω
RMS power—

Mounting dimensions

Ø≈ 10 3/8″cutout Ø9 3/16″mounting depth 5 13/16″magnet Ø≈ 5 15/16″
Cutout diameter9 3/16″
Mounting depth5 13/16″

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