DS18 EXL-X15.4D

15″ subwoofer · dual 4 Ω · 1,250 W RMS

Fs 52 HzQts 0.52Vas 0.90 ft³Xmax 1.18″

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 volume1.17 ft³ (33 L)
Qtc0.70
Fc69 Hz
F3 (−3 dB, no cabin gain)73 Hz
Example box (outside)17 5/16″ × 17 5/16″ × 10 9/16″
Open sealed box in designer

Ported

Net volume2.40 ft³ (68 L)
Tuning (Fb)40 Hz
Portslot 3 1/8 × 16 11/16″, 30 9/16″ long
Port velocity at 1,250 W65 ft/s
F3 (−3 dB, no cabin gain)36 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 14 1/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs52 Hz
Qts0.52
Qes0.572
Qms6.21
Vas0.90 ft³
Re (one coil)3.6 Ω
Sd124.7 in²
Xmax1.18″
Vd147.2 in³ calc.
Mms336 g calc.
BL26.3 T·m calc.
EBP91 — sealed or ported calc.
Sensitivity, 1 W / 1 m90 dB calc.

General

Size15″
Voice coilsdual 4 Ω
RMS power1,250 W

Mounting dimensions

Ø15 9/16″cutout Ø14″mounting depth 8 1/16″magnet Ø≈ 9 1/16″
Cutout diameter14″
Mounting depth8 1/16″
Overall diameter15 9/16″

“≈” 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 DS18 15″ models