Infinity Kappa Perfect 12.1

12″ subwoofer · 4 Ω · 350 W RMS

Fs 23.3 HzQts 0.44Vas 3.53 ft³Xmax 0.56″

Recommended box

For a sedan, one sub, 350 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 volume1.52 ft³ (43 L)
Qtc0.80
Fc43 Hz
F3 (−3 dB, no cabin gain)40 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 18 11/16″
Open sealed box in designer

Ported

Net volume3.18 ft³ (90 L)
Tuning (Fb)28 Hz
Portslot 1 3/4 × 14 5/16″, 23 1/16″ long
Port velocity at 350 W62 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 16 3/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs23.3 Hz
Qts0.44
Qes0.46
Qms10.28
Vas3.53 ft³
Re4 Ω
Sd82.3 in²
Xmax0.56″
Vd46 in³ calc.
Mms186 g calc.
BL15.4 T·m calc.
EBP51 — sealed or ported calc.
Sensitivity, 1 W / 1 m86.4 dB calc.

General

Size12″
Voice coils4 Ω
RMS power350 W

Mounting dimensions

Ø12 3/16″cutout Ø10 7/8″mounting depth 6 1/2″magnet Ø≈ 7 1/16″
Cutout diameter10 7/8″
Mounting depth6 1/2″
Overall diameter12 3/16″

“≈” 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 Infinity 12″ models