Ground Zero GZHW 38X (2x2 Ohm)

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

Fs 22.6 HzQts 0.43Vas 5.19 ft³Xmax 0.43″

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 volume2.12 ft³ (60 L)
Qtc0.80
Fc42 Hz
F3 (−3 dB, no cabin gain)40 Hz
Example box (outside)17 5/16″ × 17 5/16″ × 17 1/8″
Open sealed box in designer

Ported

Net volume4.80 ft³ (136 L)
Tuning (Fb)26 Hz
Portslot 2 15/16 × 16 11/16″, 34 13/16″ long
Port velocity at 1,000 W62 ft/s
F3 (−3 dB, no cabin gain)24 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 22 5/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs22.6 Hz
Qts0.43
Qes0.47
Qms5.05
Vas5.19 ft³
Re (one coil)≈ 1.7 Ω
Sd≈ 124 in²
Xmax0.43″
EBP48 — suits sealed calc.
Sensitivity, 1 W / 1 m87.6 dB calc.

General

Size15″
Voice coilsdual 2 Ω
RMS power1,000 W

Mounting dimensions

Ø≈ 15 3/16″cutout Ø14″mounting depth 7 5/8″magnet Ø≈ 9 1/8″
Cutout diameter14″
Mounting depth7 5/8″

“≈” 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 15″ models