Ground Zero GZPW 15SPL (1x2 Ohm)

15″ subwoofer · dual 1 Ω

Fs 39.1 HzQts 0.25Vas 1.30 ft³Xmax 0.53″

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 volume1.54 ft³ (43.5 L)
Qtc0.34
Fc53 Hz
F3 (−3 dB, no cabin gain)142 Hz
Example box (outside)17 5/16″ × 17 5/16″ × 13 1/8″
Open sealed box in designer

Ported

Net volume2.47 ft³ (70 L)
Tuning (Fb)31 Hz
Port2 round ports Ø2 1/2″, 9 3/8″ long
Port velocity at 300 W158 ft/s
F3 (−3 dB, no cabin gain)130 Hz
Example box (outside)25 7/16″ × 18 1/8″ × 13 3/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs39.1 Hz
Qts0.25
Qes0.26
Qms4.83
Vas1.30 ft³
Re (one coil)1.15 Ω
Sd128.8 in²
Xmax0.53″
Vd68.4 in³ calc.
Mms440 g calc.
BL21.9 T·m calc.
EBP150 — suits ported calc.
Sensitivity, 1 W / 1 m91.3 dB calc.

General

Size15″
Voice coilsdual 1 Ω
RMS power—

Mounting dimensions

Ø14 15/16″cutout Ø14 3/16″mounting depth 10 11/16″magnet Ø11″
Cutout diameter14 3/16″
Mounting depth10 11/16″
Overall diameter14 15/16″
Magnet diameter11″

Cone area (Sd) calculated from Fs, Vas and Mms: 128.8 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