Kenwood KFC-XW1200F

12″ subwoofer · 4 Ω · 350 W RMS

Fs 24.8 HzQts 0.54Vas 2.21 ft³Xmax 0.33″

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 volume1.73 ft³ (49 L)
Qtc0.82
Fc37 Hz
F3 (−3 dB, no cabin gain)35 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 8 3/4″
Open sealed box in designer

Ported

Net volume2.93 ft³ (83 L)
Tuning (Fb)27 Hz
Portslot 1 9/16 × 14 5/16″, 24 5/16″ long
Port velocity at 350 W61 ft/s
F3 (−3 dB, no cabin gain)24 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 15 5/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs24.8 Hz
Qts0.54
Qes0.67
Qms2.9
Vas2.21 ft³
Re3.2 Ω
Sd76 in²
Xmax0.33″
Vd25.4 in³ calc.
Mms223 g calc.
BL12.9 T·m calc.
EBP37 — suits sealed calc.
Sensitivity, 1 W / 1 m83.5 dB calc.

General

Size12″
Voice coils4 Ω
RMS power350 W

Mounting dimensions

Ø≈ 12 5/16″cutout Ø11 1/8″mounting depth 3 15/16″magnet Ø≈ 7 3/16″
Cutout diameter11 1/8″
Mounting depth3 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 Kenwood 12″ models