Kicx HeadShot Q415S (2+2)

15″ subwoofer · dual 2 Ω · 3,000 W RMS

Fs 36 HzQts 0.33Vas 1.13 ft³Xmax 0.81″
The published specs don’t add up:

Recommended box

For a sedan, one sub, 3,000 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 volume1.32 ft³ (37.5 L)
Qtc0.44
Fc49 Hz
F3 (−3 dB, no cabin gain)92 Hz
Example box (outside)16 15/16″ × 16 15/16″ × 12 3/16″
Open sealed box in designer

Ported

Net volume2.40 ft³ (68 L)
Tuning (Fb)29 Hz
Portslot 2 9/16 × 16 5/16″, 49 7/8″ long
Port velocity at 3,000 W110 ft/s
F3 (−3 dB, no cabin gain)69 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 15 11/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs36 Hz
Qts0.33
Qes0.366
Qms2.94
Vas1.13 ft³
Re (one coil)2 Ω
Sd126.2 in²
Xmax0.81″
Vd101.8 in³ calc.
Mms573 g calc.
BL26.6 T·m calc.
EBP98 — sealed or ported calc.
Sensitivity, 1 W / 1 m88.1 dB calc.

General

Size15″
Voice coilsdual 2 Ω
RMS power3,000 W

Mounting dimensions

Ø15 7/16″cutout Ø13 3/4″mounting depth 9 3/4″magnet Ø9 13/16″
Cutout diameter13 3/4″
Mounting depth9 3/4″
Overall diameter15 7/16″
Magnet diameter9 13/16″

“≈” 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