Ascendant Audio Havoc 12 D2

12″ subwoofer · dual 2 Ω · 2,750 W RMS

Fs 32.3 HzQts 0.45Vas 0.78 ft³Xmax 1.30″

Recommended box

For a sedan, one sub, 2,750 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 volume0.67 ft³ (19 L)
Qtc0.67
Fc48 Hz
F3 (−3 dB, no cabin gain)53 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 9 11/16″
Open sealed box in designer

Ported

Net volume1.41 ft³ (40 L)
Tuning (Fb)29 Hz
Port2 round ports Ø2 1/2″, 20 5/8″ long
Port velocity at 2,750 W322 ft/s
F3 (−3 dB, no cabin gain)27 Hz
Example box (outside)30 1/8″ × 15 3/4″ × 8 7/16″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs32.3 Hz
Qts0.45
Qes0.5
Qms4.97
Vas0.78 ft³
Re (one coil)2 Ω
Sd74.6 in²
Xmax1.30″
Vd96.9 in³ calc.
Mms360 g calc.
BL17.1 T·m calc.
EBP65 — sealed or ported calc.
Sensitivity, 1 W / 1 m83.7 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power2,750 W

Mounting dimensions

Ø≈ 12 5/16″cutout ≈ Ø11 1/8″mounting depth ≈ 5 7/8″magnet Ø≈ 7 3/16″
Cutout diameter≈ 11 1/8″
Mounting depth≈ 5 7/8″

Judging by its value, the published Re is for both coils in series — converted to per coil.

“≈” 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 Ascendant Audio 12″ models