Audio System H12 EVO

12″ subwoofer · dual 2 Ω · 2,200 W RMS

Fs 36 HzQts 0.45Vas 0.86 ft³Xmax 0.87″
The published specs don’t add up:

Recommended box

For a sedan, one sub, 2,200 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 volume1.01 ft³ (28.5 L)
Qtc0.61
Fc49 Hz
F3 (−3 dB, no cabin gain)60 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 12 9/16″
Open sealed box in designer

Ported

Net volume1.59 ft³ (45 L)
Tuning (Fb)32 Hz
Portround port Ø2 1/2″, 6 3/8″ long
Port velocity at 2,200 W631 ft/s
F3 (−3 dB, no cabin gain)29 Hz
Example box (outside)19 15/16″ × 15 3/4″ × 12 5/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs36 Hz
Qts0.45
Qes0.498
Qms4.42
Vas0.86 ft³
Re (one coil)1.9 Ω
Sd82.8 in²
Xmax0.87″
Vd71.7 in³ calc.
Mms325 g calc.
BL16.7 T·m calc.
EBP72 — sealed or ported calc.
Sensitivity, 1 W / 1 m85.6 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power2,200 W

Mounting dimensions

Ø12 13/16″cutout Ø11 7/16″mounting depth 10 1/16″magnet Ø≈ 7 7/16″
Cutout diameter11 7/16″
Mounting depth10 1/16″
Overall diameter12 13/16″

“≈” 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 Audio System 12″ models