Kicx PRO-POWER 381D (1+1)

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

Fs 27 HzQts 0.53Vas 3.15 ft³Xmax 0.79″

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 volume2.47 ft³ (70 L)
Qtc0.80
Fc41 Hz
F3 (−3 dB, no cabin gain)38 Hz
Example box (outside)17 5/16″ × 17 5/16″ × 19 1/2″
Open sealed box in designer

Ported

Net volume4.80 ft³ (136 L)
Tuning (Fb)27 Hz
Portslot 3 15/16 × 16 11/16″, 43 1/2″ long
Port velocity at 1,750 W65 ft/s
F3 (−3 dB, no cabin gain)24 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 25 1/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs27 Hz
Qts0.53
Qes0.582
Qms5.85
Vas3.15 ft³
Re (one coil)≈ 0.85 Ω
Sd≈ 124 in²
Xmax0.79″
EBP46 — suits sealed calc.
Sensitivity, 1 W / 1 m86.8 dB calc.

General

Size15″
Voice coilsdual 1 Ω
RMS power1,750 W

Mounting dimensions

Ø≈ 15 3/16″cutout ≈ Ø14″mounting depth 8 7/16″magnet Ø≈ 9 1/16″
Cutout diameter≈ 14″
Mounting depth8 7/16″

“≈” 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 15″ models