Infinity Kappa 1200W (SSI 2 ohm)

12″ subwoofer · 2 Ω · 500 W RMS

Fs 26.5 HzQts 0.50Vas 2.28 ft³Xmax 0.50″

Recommended box

For a sedan, one sub, 500 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 volume1.41 ft³ (40 L)
Qtc0.80
Fc43 Hz
F3 (−3 dB, no cabin gain)40 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 16 9/16″
Open sealed box in designer

Ported

Net volume3.18 ft³ (90 L)
Tuning (Fb)27 Hz
Portslot 1 15/16 × 14 5/16″, 28 3/16″ long
Port velocity at 500 W64 ft/s
F3 (−3 dB, no cabin gain)25 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 16 15/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs26.5 Hz
Qts0.50
Qes0.567
Qms4
Vas2.28 ft³
Re1.95 Ω
Sd82.3 in²
Xmax0.50″
Vd41.5 in³ calc.
Mms223 g calc.
BL11.3 T·m calc.
EBP47 — suits sealed calc.
Sensitivity, 1 W / 1 m85.3 dB calc.

General

Size12″
Voice coils2 Ω
RMS power500 W

Mounting dimensions

Ø12 15/16″cutout Ø11 5/16″mounting depth 7 5/8″magnet Ø≈ 7 3/8″
Cutout diameter11 5/16″
Mounting depth7 5/8″
Overall diameter12 15/16″

“≈” 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