DS18 SLC-12S

12″ subwoofer · 4 Ω · 250 W RMS

Fs 41 HzQts 0.90Vas 1.16 ft³Xmax 0.67″

Recommended box

For a sedan, one sub, 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 volume1.87 ft³ (53 L)
Qtc1.14
Fc52 Hz
F3 (−3 dB, no cabin gain)40 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 9 3/8″
Open sealed box in designer

Ported

Net volume3.18 ft³ (90 L)
Tuning (Fb)36 Hz
Portslot 1 9/16 × 14 5/16″, 10 3/4″ long
Port velocity at 250 W65 ft/s
F3 (−3 dB, no cabin gain)29 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 15 5/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs41 Hz
Qts0.90
Qes1.116
Qms4.61
Vas1.16 ft³
Re3.4 Ω
Sd82.3 in²
Xmax0.67″
Vd55.1 in³ calc.
Mms183 g calc.
BL12 T·m calc.
EBP37 — suits sealed calc.
Sensitivity, 1 W / 1 m85.1 dB calc.

General

Size12″
Voice coils4 Ω
RMS power250 W

Mounting dimensions

Ø12 7/16″cutout Ø10 7/8″mounting depth 5 1/2″magnet Ø≈ 7 1/16″
Cutout diameter10 7/8″
Mounting depth5 1/2″
Overall diameter12 7/16″

“≈” 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 12″ models