Kicx PRO-POWER 301D (1+1)

12″ subwoofer · dual 1 Ω · 1,250 W RMS

Fs 30 HzQts 0.39Vas 1.35 ft³Xmax 0.79″

Recommended box

For a sedan, one sub, 1,250 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 volume0.76 ft³ (21.5 L)
Qtc0.65
Fc50 Hz
F3 (−3 dB, no cabin gain)57 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 10 5/8″
Open sealed box in designer

Ported

Net volume1.45 ft³ (41 L)
Tuning (Fb)32 Hz
Portround port Ø2 1/2″, 7 1/8″ long
Port velocity at 1,250 W435 ft/s
F3 (−3 dB, no cabin gain)30 Hz
Example box (outside)22 1/16″ × 15 3/4″ × 10 5/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs30 Hz
Qts0.39
Qes0.421
Qms5.47
Vas1.35 ft³
Re (one coil)≈ 0.85 Ω
Sd≈ 76 in²
Xmax0.79″
EBP71 — sealed or ported calc.
Sensitivity, 1 W / 1 m85.9 dB calc.

General

Size12″
Voice coilsdual 1 Ω
RMS power1,250 W

Mounting dimensions

Ø≈ 12 5/16″cutout ≈ Ø11 1/8″mounting depth 8 1/16″magnet Ø≈ 7 3/16″
Cutout diameter≈ 11 1/8″
Mounting depth8 1/16″

“≈” 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