Kicx ZT15V2 (2+2)

15″ subwoofer · dual 2 Ω · 1,250 W RMS

Fs 30 HzQts 0.39Vas 2.30 ft³

Recommended box

For a sedan, one sub, 1,250 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 volume1.09 ft³ (31 L)
Qtc0.69
Fc53 Hz
F3 (−3 dB, no cabin gain)57 Hz
Example box (outside)16 9/16″ × 16 9/16″ × 11″
Open sealed box in designer

Ported

Net volume2.37 ft³ (67 L)
Tuning (Fb)32 Hz
Portslot 2 3/4 × 15 7/8″, 42 7/8″ long
Port velocity at 1,250 W62 ft/s
F3 (−3 dB, no cabin gain)31 Hz
Example box (outside)31 1/2″ × 17 5/16″ × 15 5/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs30 Hz
Qts0.39
Qes0.43
Qms4.48
Vas2.30 ft³
Re (one coil)1.8 Ω
Sd120.7 in²
Xmax≈ 0.39″
Mms372 g calc.
BL17.1 T·m calc.
EBP70 — sealed or ported calc.
Sensitivity, 1 W / 1 m88.1 dB calc.

General

Size15″
Voice coilsdual 2 Ω
RMS power1,250 W

Mounting dimensions

Ø≈ 14 9/16″cutout Ø13 3/8″mounting depth 7 11/16″magnet Ø≈ 8 11/16″
Cutout diameter13 3/8″
Mounting depth7 11/16″

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 Kicx 15″ models