Ground Zero GZRW 25XSPL-D1 (2x1 Ohm)

10″ subwoofer · dual 1 Ω

Fs 40.3 HzQts 0.47Vas 0.47 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 volume0.49 ft³ (14 L)
Qtc0.66
Fc56 Hz
F3 (−3 dB, no cabin gain)63 Hz
Example box (outside)12 3/16″ × 12 3/16″ × 9 11/16″
Open sealed box in designer

Ported

Net volume1.02 ft³ (29 L)
Tuning (Fb)34 Hz
Port2 round ports Ø2 1/2″, 20 11/16″ long
Port velocity at 300 W101 ft/s
F3 (−3 dB, no cabin gain)31 Hz
Example box (outside)23 3/8″ × 15 3/4″ × 8 1/4″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs40.3 Hz
Qts0.47
Qes0.51
Qms6
Vas0.47 ft³
Re (one coil)≈ 0.85 Ω
Sd≈ 52.7 in²
Xmax0.43″
EBP79 — sealed or ported calc.
Sensitivity, 1 W / 1 m84.3 dB calc.

General

Size10″
Voice coilsdual 1 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