MD.Lab SW-ES12

12″ subwoofer · 4 Ω · 200 W RMS

Fs 30.4 HzQts 0.65Vas 2.73 ft³

Recommended box

For a sedan, one sub, 200 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 volume1.73 ft³ (49 L)
Qtc1.04
Fc49 Hz
F3 (−3 dB, no cabin gain)40 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 8 3/4″
Open sealed box in designer

Ported

Net volume2.97 ft³ (84 L)
Tuning (Fb)35 Hz
Portslot 1 9/16 × 14 5/16″, 12 11/16″ long
Port velocity at 200 W44 ft/s
F3 (−3 dB, no cabin gain)31 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 14 5/8″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs30.4 Hz
Qts0.65
Qes0.95
Qms2.02
Vas2.73 ft³
Re3.8 Ω
Sd76.2 in²
Xmax≈ 0.39″
Mms121 g calc.
BL9.6 T·m calc.
EBP32 — suits sealed calc.
Sensitivity, 1 W / 1 m85.6 dB calc.

General

Size12″
Voice coils4 Ω
RMS power200 W

Mounting dimensions

Ø12 1/2″cutout Ø11 1/8″mounting depth 3 1/4″magnet Ø≈ 7 1/4″
Cutout diameter11 1/8″
Mounting depth3 1/4″
Overall diameter12 1/2″

Cone area (Sd) calculated from Fs, Vas and Mms: 76.2 in².

“≈” 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 MD.Lab 12″ models