Kicx ZC15 (2+2)

15″ subwoofer · dual 2 Ω · 700 W RMS

Fs 37 HzQts 0.61Vas 2.13 ft³

Recommended box

For a sedan, one sub, 700 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 volume2.83 ft³ (80 L)
Qtc0.81
Fc49 Hz
F3 (−3 dB, no cabin gain)45 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 12″
Open sealed box in designer

Ported

Net volume4.80 ft³ (136 L)
Tuning (Fb)32 Hz
Portslot 2 15/16 × 16 5/16″, 20 7/16″ long
Port velocity at 700 W63 ft/s
F3 (−3 dB, no cabin gain)28 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 21 5/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs37 Hz
Qts0.61
Qes0.68
Qms6.12
Vas2.13 ft³
Re (one coil)2.07 Ω
Sd124.1 in²
Xmax≈ 0.39″
Mms279 g calc.
BL14 T·m calc.
EBP54 — sealed or ported calc.
Sensitivity, 1 W / 1 m88.5 dB calc.

General

Size15″
Voice coilsdual 2 Ω
RMS power700 W

Mounting dimensions

Ø≈ 15 1/16″cutout Ø13 7/8″mounting depth 7 1/2″magnet Ø≈ 9″
Cutout diameter13 7/8″
Mounting depth7 1/2″

Cone area (Sd) calculated from Fs, Vas and Mms: 124.1 in².

Judging by its value, the published Re is for both coils in parallel — 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