American Bass GF-1211

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

Fs 31.8 HzQts 0.37Vas 1.23 ft³Xmax 0.69″

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 volume0.94 ft³ (26.5 L)
Qtc0.56
Fc48 Hz
F3 (−3 dB, no cabin gain)66 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 11 13/16″
Open sealed box in designer

Ported

Net volume1.52 ft³ (43 L)
Tuning (Fb)32 Hz
Portround port Ø2 1/2″, 6 3/4″ long
Port velocity at 3,000 W705 ft/s
F3 (−3 dB, no cabin gain)31 Hz
Example box (outside)20 1/2″ × 15 3/4″ × 11 13/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs31.8 Hz
Qts0.37
Qes0.408
Qms3.85
Vas1.23 ft³
Re (one coil)≈ 0.85 Ω
Sd79.3 in²
Xmax0.69″
Vd54.6 in³ calc.
Mms266 g calc.
BL10.5 T·m calc.
EBP78 — sealed or ported calc.
Sensitivity, 1 W / 1 m86.4 dB calc.

General

Size12″
Voice coilsdual 1 Ω
RMS power3,000 W

Mounting dimensions

Ø≈ 12 1/2″cutout Ø11 5/16″mounting depth 9 5/16″magnet Ø≈ 7 3/8″
Cutout diameter11 5/16″
Mounting depth9 5/16″

Cone area (Sd) calculated from Fs, Vas and Mms: 79.3 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 American Bass 12″ models