Kicx STQ-382 (2+2)

15″ subwoofer · dual 2 Ω · 500 W RMS

Fs 23 HzQts 0.85Vas 6.58 ft³Xmax 0.32″

Recommended box

For a sedan, one sub, 500 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 volume2.83 ft³ (80 L)
Qtc1.55
Fc42 Hz
F3 (−3 dB, no cabin gain)30 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 11 3/4″
Open sealed box in designer

Ported

Net volume4.80 ft³ (136 L)
Tuning (Fb)35 Hz
Portslot 2 3/16 × 16 11/16″, 11 7/16″ long
Port velocity at 500 W61 ft/s
F3 (−3 dB, no cabin gain)30 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 19 9/16″
Open ported box in designer
2030405060801001502007278849096102HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs23 Hz
Qts0.85
Qes0.99
Qms5.91
Vas6.58 ft³
Re (one coil)≈ 1.7 Ω
Sd≈ 124 in²
Xmax0.32″
EBP23 — suits sealed calc.
Sensitivity, 1 W / 1 m85.6 dB calc.

General

Size15″
Voice coilsdual 2 Ω
RMS power500 W

Mounting dimensions

Ø≈ 15 3/16″cutout ≈ Ø14″mounting depth 7 1/16″magnet Ø≈ 9 1/16″
Cutout diameter≈ 14″
Mounting depth7 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 15″ models