Ground Zero GZTW 10F (2x2 Ohm)

10″ subwoofer · dual 2 Ω · 300 W RMS

Fs 33 HzQts 0.57Vas 1.20 ft³Xmax 1.18″
The published specs don’t add up:

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 volume1.09 ft³ (31 L)
Qtc0.82
Fc48 Hz
F3 (−3 dB, no cabin gain)44 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 6 1/16″
Open sealed box in designer

Ported

Net volume1.84 ft³ (52 L)
Tuning (Fb)33 Hz
Portslot 1 9/16 × 14 5/16″, 26 1/4″ long
Port velocity at 300 W54 ft/s
F3 (−3 dB, no cabin gain)29 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 10 15/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs33 Hz
Qts0.57
Qes0.62
Qms6.7
Vas1.20 ft³
Re (one coil)2 Ω
Sd47.8 in²
Xmax1.18″
Vd56.5 in³ calc.
Mms92 g calc.
BL7.9 T·m calc.
EBP53 — sealed or ported calc.
Sensitivity, 1 W / 1 m85 dB calc.

General

Size10″
Voice coilsdual 2 Ω
RMS power300 W

Mounting dimensions

Ø10 1/4″cutout Ø9 1/8″mounting depth 3 7/16″magnet Ø≈ 5 15/16″
Cutout diameter9 1/8″
Mounting depth3 7/16″
Overall diameter10 1/4″

Cone area (Sd) calculated from Fs, Vas and Mms: 47.8 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 10″ models