Kicx GT 12R (4+4)

12″ subwoofer · dual 4 Ω · 300 W RMS

Fs 32 HzQts 0.44Vas 3.43 ft³

Recommended box

For a sedan, one sub, 300 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 volume1.48 ft³ (42 L)
Qtc0.80
Fc58 Hz
F3 (−3 dB, no cabin gain)55 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 18 5/16″
Open sealed box in designer

Ported

Net volume3.04 ft³ (86 L)
Tuning (Fb)37 Hz
Portslot 1 3/4 × 14 5/16″, 12 3/16″ long
Port velocity at 300 W60 ft/s
F3 (−3 dB, no cabin gain)35 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 14 15/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs32 Hz
Qts0.44
Qes0.5
Qms3.65
Vas3.43 ft³
Re (one coil)3.6 Ω
Sd78.4 in²
Xmax≈ 0.39″
Mms92 g calc.
BL11.6 T·m calc.
EBP64 — sealed or ported calc.
Sensitivity, 1 W / 1 m90 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power300 W

Mounting dimensions

Ø≈ 12 3/16″cutout Ø11″mounting depth 5 1/2″magnet Ø≈ 7 3/16″
Cutout diameter11″
Mounting depth5 1/2″

“≈” 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 12″ models