AMPIRE BLACK12.1

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

Fs 30.7 HzQts 0.35Vas 0.91 ft³Xmax 0.98″

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 volume0.81 ft³ (23 L)
Qtc0.51
Fc45 Hz
F3 (−3 dB, no cabin gain)69 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 11 3/16″
Open sealed box in designer

Ported

Net volume1.52 ft³ (43 L)
Tuning (Fb)27 Hz
Port2 round ports Ø2 1/2″, 22 1/4″ long
Port velocity at 2,000 W276 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)23 3/4″ × 15 3/4″ × 11 1/4″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs30.7 Hz
Qts0.35
Qes0.39
Qms3.66
Vas0.91 ft³
Re (one coil)0.8 Ω
Sd79.2 in²
Xmax0.98″
Vd77.9 in³ calc.
Mms386 g calc.
BL12.4 T·m calc.
EBP79 — sealed or ported calc.
Sensitivity, 1 W / 1 m84.8 dB calc.

General

Size12″
Voice coilsdual 1 Ω
RMS power2,000 W

Mounting dimensions

Ø12 3/8″cutout Ø11″mounting depth 8 3/4″magnet Ø≈ 7 1/8″
Cutout diameter11″
Mounting depth8 3/4″
Overall diameter12 3/8″

“≈” 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 AMPIRE 12″ models