Ground Zero GZNW 15XSPL (2x1 Ohm)

15″ subwoofer · dual 1 Ω

Fs 39 HzQts 0.57Vas 1.70 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 volume1.80 ft³ (51 L)
Qtc0.80
Fc54 Hz
F3 (−3 dB, no cabin gain)51 Hz
Example box (outside)17 5/16″ × 17 5/16″ × 14 15/16″
Open sealed box in designer

Ported

Net volume4.84 ft³ (137 L)
Tuning (Fb)31 Hz
Portslot 1 15/16 × 16 11/16″, 14 3/16″ long
Port velocity at 300 W63 ft/s
F3 (−3 dB, no cabin gain)27 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 19 7/8″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs39 Hz
Qts0.57
Qes0.63
Qms6.33
Vas1.70 ft³
Re (one coil)1.15 Ω
Sd124.6 in²
Xmax0.98″
Vd122.6 in³ calc.
Mms318 g calc.
BL11.9 T·m calc.
EBP62 — sealed or ported calc.
Sensitivity, 1 W / 1 m88.6 dB calc.

General

Size15″
Voice coilsdual 1 Ω
RMS power—

Mounting dimensions

Ø15 7/16″cutout Ø14 1/8″mounting depth 10 1/4″magnet Ø≈ 9 3/16″
Cutout diameter14 1/8″
Mounting depth10 1/4″
Overall diameter15 7/16″

Cone area (Sd) calculated from Fs, Vas and Mms: 124.6 in².

“≈” 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