Ascendant Audio Mayhem 15 D2

15″ subwoofer · dual 2 Ω · 4,500 W RMS

Fs 38.5 HzQts 0.45Vas 1.01 ft³Xmax 1.42″

Recommended box

For a sedan, one sub, 4,500 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 volume1.13 ft³ (32 L)
Qtc0.61
Fc53 Hz
F3 (−3 dB, no cabin gain)65 Hz
Example box (outside)17 5/16″ × 17 5/16″ × 10 5/16″
Open sealed box in designer

Ported

Net volume2.40 ft³ (68 L)
Tuning (Fb)31 Hz
Portslot 2 15/16 × 16 11/16″, 51 5/16″ long
Port velocity at 4,500 W116 ft/s
F3 (−3 dB, no cabin gain)28 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 16 1/4″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs38.5 Hz
Qts0.45
Qes0.485
Qms5.45
Vas1.01 ft³
Re (one coil)1.63 Ω
Sd125.6 in²
Xmax1.42″
Vd177.9 in³ calc.
Mms553 g calc.
BL21.2 T·m calc.
EBP79 — sealed or ported calc.
Sensitivity, 1 W / 1 m87.3 dB calc.

General

Size15″
Voice coilsdual 2 Ω
RMS power4,500 W

Mounting dimensions

Ø≈ 15 3/16″cutout ≈ Ø14″mounting depth ≈ 7 1/16″magnet Ø≈ 9 1/16″
Cutout diameter≈ 14″
Mounting depth≈ 7 1/16″

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 15″ models