Ground Zero GZNW 15NEO-EXTREME (2x1 Ohm)

15″ subwoofer · dual 1 Ω · 3,000 W RMS

Fs 36.6 HzQts 0.16Vas 1.24 ft³Xmax 2.56″
The published specs don’t add up:

Recommended box

For a sedan, one sub, 3,000 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 volume1.71 ft³ (48.5 L)
Qtc0.21
Fc48 Hz
F3 (−3 dB, no cabin gain)221 Hz
Example box (outside)17 5/16″ × 17 5/16″ × 14 5/16″
Open sealed box in designer

Ported

Net volume2.37 ft³ (67 L)
Tuning (Fb)27 Hz
Portround port Ø3″, 8 11/16″ long
Port velocity at 3,000 W655 ft/s
F3 (−3 dB, no cabin gain)215 Hz
Example box (outside)22 1/4″ × 18 1/8″ × 14 3/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs36.6 Hz
Qts0.16
Qes0.164
Qms6
Vas1.24 ft³
Re (one coil)≈ 0.85 Ω
Sd≈ 124 in²
Xmax2.56″
EBP223 — suits ported calc.
Sensitivity, 1 W / 1 m92.2 dB calc.

General

Size15″
Voice coilsdual 1 Ω
RMS power3,000 W

Mounting dimensions

Ø≈ 15 1/4″cutout Ø14 1/8″mounting depth 11 13/16″magnet Ø7 13/16″
Cutout diameter14 1/8″
Mounting depth11 13/16″
Magnet diameter7 13/16″

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