American Bass HD-1211

12″ subwoofer · dual 1 Ω · 2,000 W RMS

Fs 36 HzQts 0.52Vas 0.66 ft³

Recommended box

For a sedan, one sub, 2,000 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 volume0.85 ft³ (24 L)
Qtc0.69
Fc48 Hz
F3 (−3 dB, no cabin gain)51 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 10 15/16″
Open sealed box in designer

Ported

Net volume1.48 ft³ (42 L)
Tuning (Fb)30 Hz
Port2 round ports Ø2 1/2″, 18 1/8″ long
Port velocity at 2,000 W290 ft/s
F3 (−3 dB, no cabin gain)27 Hz
Example box (outside)23 5/8″ × 15 3/4″ × 10 13/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs36 Hz
Qts0.52
Qes0.563
Qms6.48
Vas0.66 ft³
Re (one coil)≈ 0.85 Ω
Sd68 in²
Xmax≈ 0.39″
Mms285 g calc.
BL9.9 T·m calc.
EBP64 — sealed or ported calc.
Sensitivity, 1 W / 1 m83.9 dB calc.

General

Size12″
Voice coilsdual 1 Ω
RMS power2,000 W

Mounting dimensions

Ø≈ 12 5/8″cutout Ø11 7/16″mounting depth 8 3/8″magnet Ø≈ 7 7/16″
Cutout diameter11 7/16″
Mounting depth8 3/8″

Cone area (Sd) calculated from Fs, Vas and Mms: 68 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