JBL Selenium 18SWV3.0

18″ subwoofer · 4 Ω · 1,500 W RMS

Fs 50.7 HzQts 0.68Vas 3.05 ft³Xmax 0.42″

Recommended box

For a sedan, one sub, 1,500 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 volume4.20 ft³ (119 L)
Qtc0.89
Fc67 Hz
F3 (−3 dB, no cabin gain)58 Hz
Example box (outside)31 1/2″ × 20 1/2″ × 14 15/16″
Open sealed box in designer

Ported

Net volume7.17 ft³ (203 L)
Tuning (Fb)43 Hz
Portslot 5 5/16 × 19 1/16″, 12 1/8″ long
Port velocity at 1,500 W65 ft/s
F3 (−3 dB, no cabin gain)37 Hz
Example box (outside)31 1/2″ × 20 1/2″ × 26 3/16″
Open ported box in designer
2030405060801001502007278849096102HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs50.7 Hz
Qts0.68
Qes0.7
Qms19.32
Vas3.05 ft³
Re3.12 Ω
Sd185.1 in²
Xmax0.42″
Vd77.2 in³ calc.
Mms230 g calc.
BL18.1 T·m calc.
EBP72 — sealed or ported calc.
Sensitivity, 1 W / 1 m94.1 dB calc.

General

Size18″
Voice coils4 Ω
RMS power1,500 W

Mounting dimensions

Ø≈ 17 11/16″cutout ≈ Ø16 9/16″mounting depth ≈ 8 1/4″magnet Ø≈ 10 3/4″
Cutout diameter≈ 16 9/16″
Mounting depth≈ 8 1/4″

“≈” 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 JBL Selenium 18″ models