Kicker ES 12" 4-Ohm SVC (ES124)

12″ subwoofer · 4 Ω · 125 W RMS

Fs 30.4 HzQts 0.55Vas 3.45 ft³Xmax 0.30″

Recommended box

For a sedan, one sub, 125 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 volume1.84 ft³ (52 L)
Qtc0.93
Fc52 Hz
F3 (−3 dB, no cabin gain)44 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 9 3/16″
Open sealed box in designer

Ported

Net volume3.11 ft³ (88 L)
Tuning (Fb)36 Hz
Portslot 1 9/16 × 14 5/16″, 11 1/16″ long
Port velocity at 125 W43 ft/s
F3 (−3 dB, no cabin gain)33 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 15 1/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs30.4 Hz
Qts0.55
Qes0.575
Qms11.99
Vas3.45 ft³
Re3.65 Ω
Sd80.4 in²
Xmax0.30″
Vd23.8 in³ calc.
Mms107 g calc.
BL11.4 T·m calc.
EBP53 — sealed or ported calc.
Sensitivity, 1 W / 1 m88.8 dB calc.

General

Size12″
Voice coils4 Ω
RMS power125 W

Mounting dimensions

Ø12 1/2″cutout Ø11″mounting depth 5 13/16″magnet Ø≈ 7 1/8″
Cutout diameter11″
Mounting depth5 13/16″
Overall diameter12 1/2″

“≈” 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