American Bass XMAXXX-1211

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

Fs 31.9 HzQts 0.38Vas 0.86 ft³Xmax 0.79″

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 volume0.92 ft³ (26 L)
Qtc0.53
Fc44 Hz
F3 (−3 dB, no cabin gain)65 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 11 5/8″
Open sealed box in designer

Ported

Net volume1.38 ft³ (39 L)
Tuning (Fb)29 Hz
Port2 round ports Ø2 1/2″, 21 3/16″ long
Port velocity at 3,000 W337 ft/s
F3 (−3 dB, no cabin gain)27 Hz
Example box (outside)21 1/8″ × 15 3/4″ × 11 5/8″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs31.9 Hz
Qts0.38
Qes0.415
Qms4.56
Vas0.86 ft³
Re (one coil)≈ 0.85 Ω
Sd72 in²
Xmax0.79″
Vd56.7 in³ calc.
Mms313 g calc.
BL11.3 T·m calc.
EBP77 — sealed or ported calc.
Sensitivity, 1 W / 1 m84.8 dB calc.

General

Size12″
Voice coilsdual 1 Ω
RMS power3,000 W

Mounting dimensions

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

Cone area (Sd) calculated from Fs, Vas and Mms: 72 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