Ascendant Audio Chaos 12 D1

12″ subwoofer · dual 1 Ω · 1,750 W RMS

Fs 35.1 HzQts 0.40Vas 0.95 ft³Xmax 0.94″

Recommended box

For a sedan, one sub, 1,750 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)
Qtc0.61
Fc55 Hz
F3 (−3 dB, no cabin gain)67 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)33 Hz
Portslot 1 3/4 × 14 5/16″, 39 15/16″ long
Port velocity at 1,750 W108 ft/s
F3 (−3 dB, no cabin gain)31 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 10 5/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs35.1 Hz
Qts0.40
Qes0.43
Qms4.86
Vas0.95 ft³
Re (one coil)0.76 Ω
Sd74.6 in²
Xmax0.94″
Vd70.4 in³ calc.
Mms249 g calc.
BL9.9 T·m calc.
EBP82 — sealed or ported calc.
Sensitivity, 1 W / 1 m86.3 dB calc.

General

Size12″
Voice coilsdual 1 Ω
RMS power1,750 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