Kicx HeadShot Q412S (1+1)

12″ subwoofer · dual 1 Ω · 3,000 W RMS

Fs 42 HzQts 0.31Vas 0.60 ft³Xmax 0.91″
The published specs don’t add up:

Recommended box

For a sedan, one sub, 3,000 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 volume0.81 ft³ (23 L)
Qtc0.41
Fc55 Hz
F3 (−3 dB, no cabin gain)115 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 11 3/16″
Open sealed box in designer

Ported

Net volume1.55 ft³ (44 L)
Tuning (Fb)31 Hz
Portround port Ø2 1/2″, 7 1/16″ long
Port velocity at 3,000 W764 ft/s
F3 (−3 dB, no cabin gain)98 Hz
Example box (outside)22 1/8″ × 15 3/4″ × 11 1/4″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs42 Hz
Qts0.31
Qes0.354
Qms2.58
Vas0.60 ft³
Re (one coil)0.9 Ω
Sd80.9 in²
Xmax0.91″
Vd73.3 in³ calc.
Mms326 g calc.
BL14.8 T·m calc.
EBP119 — suits ported calc.
Sensitivity, 1 W / 1 m87.5 dB calc.

General

Size12″
Voice coilsdual 1 Ω
RMS power3,000 W

Mounting dimensions

Ø12 11/16″cutout Ø11 1/8″mounting depth 8 11/16″magnet Ø≈ 7 3/16″
Cutout diameter11 1/8″
Mounting depth8 11/16″
Overall diameter12 11/16″

“≈” 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 Kicx 12″ models