Ground Zero GZPW 15 Limited (2x1 Ohm)

15″ subwoofer · dual 1 Ω · 5,000 W RMS

Fs 35.6 HzQts 0.39Vas 1.78 ft³

Recommended box

For a sedan, one sub, 5,000 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 volume1.62 ft³ (46 L)
Qtc0.56
Fc52 Hz
F3 (−3 dB, no cabin gain)70 Hz
Example box (outside)17 5/16″ × 17 5/16″ × 13 3/4″
Open sealed box in designer

Ported

Net volume2.37 ft³ (67 L)
Tuning (Fb)34 Hz
Portslot 3 9/16 × 16 11/16″, 51 7/16″ long
Port velocity at 5,000 W102 ft/s
F3 (−3 dB, no cabin gain)32 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 17 1/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs35.6 Hz
Qts0.39
Qes0.417
Qms6
Vas1.78 ft³
Re (one coil)≈ 0.85 Ω
Sd≈ 124 in²
Xmax≈ 0.39″
EBP85 — sealed or ported calc.
Sensitivity, 1 W / 1 m89.4 dB calc.

General

Size15″
Voice coilsdual 1 Ω
RMS power5,000 W

Mounting dimensions

Ø15 7/16″cutout Ø14 1/8″mounting depth 11 1/4″magnet Ø≈ 9 3/16″
Cutout diameter14 1/8″
Mounting depth11 1/4″
Overall diameter15 7/16″

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 15″ models