Kicker Freeair F12a 12" 4-Ohm SVC (F12a)

12″ subwoofer · 4 Ω

Fs 27.6 HzQts 0.57Vas 5.19 ft³Xmax 0.30″

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 volume1.87 ft³ (53 L)
Qtc1.11
Fc54 Hz
F3 (−3 dB, no cabin gain)43 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 9 3/8″
Open sealed box in designer

Ported

Net volume3.18 ft³ (90 L)
Tuning (Fb)39 Hz
Portslot 1 9/16 × 14 5/16″, 8 9/16″ long
Port velocity at 300 W65 ft/s
F3 (−3 dB, no cabin gain)36 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

Fs27.6 Hz
Qts0.57
Qes0.613
Qms8.65
Vas5.19 ft³
Re3.59 Ω
Sd82.3 in²
Xmax0.30″
Vd25 in³ calc.
Mms90 g calc.
BL9.6 T·m calc.
EBP45 — suits sealed calc.
Sensitivity, 1 W / 1 m89 dB calc.

General

Size12″
Voice coils4 Ω
RMS power—

Mounting dimensions

Ø≈ 12 5/16″cutout Ø11 1/8″mounting depth 5″magnet Ø≈ 7 1/4″
Cutout diameter11 1/8″
Mounting depth5″

“≈” 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 Kicker 12″ models