Ground Zero GZNW 15X (2x2 Ohm)

15″ subwoofer · dual 2 Ω · 2,500 W RMS

Fs 37.8 HzQts 0.50Vas 1.73 ft³Xmax 0.98″

Recommended box

For a sedan, one sub, 2,500 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 volume1.39 ft³ (39.5 L)
Qtc0.74
Fc57 Hz
F3 (−3 dB, no cabin gain)57 Hz
Example box (outside)17 5/16″ × 17 5/16″ × 12 1/8″
Open sealed box in designer

Ported

Net volume3.46 ft³ (98 L)
Tuning (Fb)33 Hz
Portslot 4 3/4 × 16 11/16″, 48 5/8″ long
Port velocity at 2,500 W66 ft/s
F3 (−3 dB, no cabin gain)30 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 22 5/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs37.8 Hz
Qts0.50
Qes0.54
Qms5.96
Vas1.73 ft³
Re (one coil)≈ 1.7 Ω
Sd≈ 124 in²
Xmax0.98″
EBP70 — sealed or ported calc.
Sensitivity, 1 W / 1 m88.9 dB calc.

General

Size15″
Voice coilsdual 2 Ω
RMS power2,500 W

Mounting dimensions

Ø≈ 15 3/8″cutout Ø14 3/16″mounting depth 9 3/4″magnet Ø≈ 9 3/16″
Cutout diameter14 3/16″
Mounting depth9 3/4″

“≈” 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