American Bass VFLCOMP-1211

12″ subwoofer · dual 1 Ω · 5,000 W RMS

Fs 35 HzQts 0.40Vas 0.60 ft³Xmax 1.08″

Recommended box

For a sedan, one sub, 5,000 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 volume0.95 ft³ (27 L)
Qtc0.52
Fc45 Hz
F3 (−3 dB, no cabin gain)68 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 12″
Open sealed box in designer

Ported

Net volume1.48 ft³ (42 L)
Tuning (Fb)28 Hz
Port2 round ports Ø2 1/2″, 21 1/16″ long
Port velocity at 5,000 W464 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)21 9/16″ × 15 3/4″ × 12″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs35 Hz
Qts0.40
Qes0.446
Qms4.39
Vas0.60 ft³
Re (one coil)≈ 0.85 Ω
Sd77.2 in²
Xmax1.08″
Vd83.6 in³ calc.
Mms425 g calc.
BL13.3 T·m calc.
EBP78 — sealed or ported calc.
Sensitivity, 1 W / 1 m84.2 dB calc.

General

Size12″
Voice coilsdual 1 Ω
RMS power5,000 W

Mounting dimensions

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

Cone area (Sd) calculated from Fs, Vas and Mms: 77.2 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