Ground Zero GZNW 15SPL (2x1 Ohm)

15″ subwoofer · dual 1 Ω

Fs 32.3 HzQts 0.42Vas 2.30 ft³Xmax 0.98″

Recommended box

For a sedan, one sub, 300 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 volume1.45 ft³ (41 L)
Qtc0.68
Fc52 Hz
F3 (−3 dB, no cabin gain)57 Hz
Example box (outside)17 5/16″ × 17 5/16″ × 12 1/2″
Open sealed box in designer

Ported

Net volume2.86 ft³ (81 L)
Tuning (Fb)33 Hz
Port2 round ports Ø2 1/2″, 6 11/16″ long
Port velocity at 300 W157 ft/s
F3 (−3 dB, no cabin gain)31 Hz
Example box (outside)29 15/16″ × 18 1/8″ × 12 5/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs32.3 Hz
Qts0.42
Qes0.452
Qms6
Vas2.30 ft³
Re (one coil)≈ 0.85 Ω
Sd≈ 124 in²
Xmax0.98″
EBP71 — sealed or ported calc.
Sensitivity, 1 W / 1 m88.9 dB calc.

General

Size15″
Voice coilsdual 1 Ω
RMS power—

Mounting dimensions

Ø≈ 15 3/8″cutout Ø14 3/16″mounting depth 10 1/16″magnet Ø≈ 9 3/16″
Cutout diameter14 3/16″
Mounting depth10 1/16″

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