Incriminator Audio Death Penalty 18 D1

18″ subwoofer · dual 1 Ω · 2,500 W RMS

Fs 38 HzQts 0.45Vas 4.34 ft³Xmax 1.14″

Recommended box

For a sedan, one sub, 2,500 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 volume2.37 ft³ (67 L)
Qtc0.75
Fc64 Hz
F3 (−3 dB, no cabin gain)64 Hz
Example box (outside)20 1/16″ × 20 1/16″ × 14 9/16″
Open sealed box in designer

Ported

Net volume6.46 ft³ (183 L)
Tuning (Fb)36 Hz
Portslot 5 11/16 × 19 7/16″, 26 3/4″ long
Port velocity at 2,500 W65 ft/s
F3 (−3 dB, no cabin gain)33 Hz
Example box (outside)31 1/2″ × 20 7/8″ × 26 3/4″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs38 Hz
Qts0.45
Qes0.47
Qms9.32
Vas4.34 ft³
Re (one coil)≈ 0.85 Ω
Sd187.6 in²
Xmax1.14″
Vd214.1 in³ calc.
Mms296 g calc.
BL11.3 T·m calc.
EBP81 — sealed or ported calc.
Sensitivity, 1 W / 1 m93.6 dB calc.

General

Size18″
Voice coilsdual 1 Ω
RMS power2,500 W

Mounting dimensions

Ø18 1/2″cutout Ø16 7/8″mounting depth 12 1/8″magnet Ø≈ 10 15/16″
Cutout diameter16 7/8″
Mounting depth12 1/8″
Overall diameter18 1/2″

“≈” 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