Ground Zero GZHW 25SPL (2x1 Ohm)

10″ subwoofer · dual 1 Ω · 1,200 W RMS

Fs 41.8 HzQts 0.49Vas 0.30 ft³Xmax 0.55″

Recommended box

For a sedan, one sub, 1,200 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 volume0.46 ft³ (13 L)
Qtc0.63
Fc54 Hz
F3 (−3 dB, no cabin gain)64 Hz
Example box (outside)12 5/8″ × 12 5/8″ × 8 5/8″
Open sealed box in designer

Ported

Net volume0.99 ft³ (28 L)
Tuning (Fb)30 Hz
Portround port Ø2 1/2″, 13 1/8″ long
Port velocity at 1,200 W391 ft/s
F3 (−3 dB, no cabin gain)27 Hz
Example box (outside)20 1/16″ × 15 3/4″ × 8 11/16″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs41.8 Hz
Qts0.49
Qes0.519
Qms7.98
Vas0.30 ft³
Re (one coil)0.96 Ω
Sd51.7 in²
Xmax0.55″
Vd28.5 in³ calc.
Mms267 g calc.
BL11.4 T·m calc.
EBP81 — sealed or ported calc.
Sensitivity, 1 W / 1 m82.8 dB calc.

General

Size10″
Voice coilsdual 1 Ω
RMS power1,200 W

Mounting dimensions

Ø10 11/16″cutout Ø9 7/16″mounting depth 6 1/8″magnet Ø≈ 6 1/8″
Cutout diameter9 7/16″
Mounting depth6 1/8″
Overall diameter10 11/16″

“≈” 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