Ground Zero GZRW 8FL (2 Ohm)

8″ subwoofer · 2 Ω · 150 W RMS

Fs 45.3 HzQts 0.94Vas 0.62 ft³Xmax 0.28″

Recommended box

For a sedan, one sub, 150 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 volume0.74 ft³ (21 L)
Qtc1.27
Fc61 Hz
F3 (−3 dB, no cabin gain)46 Hz
Example box (outside)10 1/4″ × 10 1/4″ × 18 11/16″
Open sealed box in designer

Ported

Net volume1.27 ft³ (36 L)
Tuning (Fb)43 Hz
Portslot 1 9/16 × 14 5/16″, 21 3/4″ long
Port velocity at 150 W35 ft/s
F3 (−3 dB, no cabin gain)35 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 8 3/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs45.3 Hz
Qts0.94
Qes1.016
Qms12.22
Vas0.62 ft³
Re1.6 Ω
Sd33.1 in²
Xmax0.28″
Vd9.1 in³ calc.
Mms45 g calc.
BL4.5 T·m calc.
EBP45 — suits sealed calc.
Sensitivity, 1 W / 1 m84.1 dB calc.

General

Size8″
Voice coils2 Ω
RMS power150 W

Mounting dimensions

Ø8 1/16″cutout Ø7″mounting depth 2 3/16″magnet Ø≈ 4 9/16″
Cutout diameter7″
Mounting depth2 3/16″
Overall diameter8 1/16″

Cone area (Sd) calculated from Fs, Vas and Mms: 33.1 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 8″ models