Kicx HeadShot DM18 (1+1)

18″ subwoofer · dual 1 Ω · 4,000 W RMS

Fs 51 HzQts 0.96Vas 1.54 ft³

Recommended box

For a sedan, one sub, 4,000 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 volume3.07 ft³ (87 L)
Qtc1.17
Fc62 Hz
F3 (−3 dB, no cabin gain)47 Hz
Example box (outside)31 1/2″ × 20 1/2″ × 11 9/16″
Open sealed box in designer

Ported

Net volume6.99 ft³ (198 L)
Tuning (Fb)37 Hz
Portslot 5 7/8 × 19 1/16″, 22 11/16″ long
Port velocity at 4,000 W90 ft/s
F3 (−3 dB, no cabin gain)31 Hz
Example box (outside)31 1/2″ × 20 1/2″ × 28 1/8″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs51 Hz
Qts0.96
Qes1.09
Qms7.98
Vas1.54 ft³
Re (one coil)0.85 Ω
Sd180.6 in²
Xmax≈ 0.39″
Mms430 g calc.
BL10.4 T·m calc.
EBP47 — suits sealed calc.
Sensitivity, 1 W / 1 m89.2 dB calc.

General

Size18″
Voice coilsdual 1 Ω
RMS power4,000 W

Mounting dimensions

Ø≈ 17 11/16″cutout ≈ Ø16 9/16″mounting depth ≈ 8 1/4″magnet Ø≈ 10 3/4″
Cutout diameter≈ 16 9/16″
Mounting depth≈ 8 1/4″

“≈” 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 Kicx 18″ models