Ground Zero GZNW 15XMAX (2x1 Ohm)

15″ subwoofer · dual 1 Ω · 4,000 W RMS

Fs 29.5 HzQts 0.33Vas 1.26 ft³Xmax 2.36″

Recommended box

For a sedan, one sub, 4,000 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)
Qtc0.44
Fc39 Hz
F3 (−3 dB, no cabin gain)75 Hz
Example box (outside)17 5/16″ × 17 5/16″ × 13 3/4″
Open sealed box in designer

Ported

Net volume2.12 ft³ (60 L)
Tuning (Fb)26 Hz
Portround port Ø2 1/2″, 7 7/16″ long
Port velocity at 4,000 W936 ft/s
F3 (−3 dB, no cabin gain)25 Hz
Example box (outside)20 13/16″ × 18 1/8″ × 13 3/4″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs29.5 Hz
Qts0.33
Qes0.352
Qms5.1
Vas1.26 ft³
Re (one coil)1 Ω
Sd110 in²
Xmax2.36″
Vd259.9 in³ calc.
Mms582 g calc.
BL17.5 T·m calc.
EBP84 — sealed or ported calc.
Sensitivity, 1 W / 1 m86.2 dB calc.

General

Size15″
Voice coilsdual 1 Ω
RMS power4,000 W

Mounting dimensions

Ø15 7/16″cutout Ø14 1/8″mounting depth 11 1/4″magnet Ø9 13/16″
Cutout diameter14 1/8″
Mounting depth11 1/4″
Overall diameter15 7/16″
Magnet diameter9 13/16″

Judging by its value, the published Re is for both coils in series — converted to per coil.

“≈” 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