Infinity Kappa 120.1DVC

12″ subwoofer · dual 4 Ω · 250 W RMS

Fs 23.1 HzQts 0.43Vas 5.47 ft³Xmax 0.37″

Recommended box

For a sedan, one sub, 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 volume1.80 ft³ (51 L)
Qtc0.86
Fc46 Hz
F3 (−3 dB, no cabin gain)42 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 9 1/16″
Open sealed box in designer

Ported

Net volume3.07 ft³ (87 L)
Tuning (Fb)32 Hz
Portslot 1 9/16 × 14 5/16″, 15 1/4″ long
Port velocity at 250 W56 ft/s
F3 (−3 dB, no cabin gain)31 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 15 3/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs23.1 Hz
Qts0.43
Qes0.44
Qms14.29
Vas5.47 ft³
Re (one coil)4 Ω
Sd79.2 in²
Xmax0.37″
Vd29.6 in³ calc.
Mms113 g calc.
BL12.2 T·m calc.
EBP52 — sealed or ported calc.
Sensitivity, 1 W / 1 m88.4 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power250 W

Mounting dimensions

Ø12″cutout Ø10 13/16″mounting depth 5 13/16″magnet Ø≈ 7 1/16″
Cutout diameter10 13/16″
Mounting depth5 13/16″
Overall diameter12″

“≈” 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