Alpine SWE-1244E (Type-E)

12″ subwoofer · 4 Ω · 200 W RMS

Fs 31 HzQts 0.52Vas 3.62 ft³Xmax 0.30″

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 volume1.87 ft³ (53 L)
Qtc0.89
Fc53 Hz
F3 (−3 dB, no cabin gain)47 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)37 Hz
Portslot 1 9/16 × 14 5/16″, 9 15/16″ long
Port velocity at 200 W53 ft/s
F3 (−3 dB, no cabin gain)34 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

Fs31 Hz
Qts0.52
Qes0.62
Qms3.3
Vas3.62 ft³
Re3.3 Ω
Sd82 in²
Xmax0.30″
Vd24.2 in³ calc.
Mms102 g calc.
BL10.3 T·m calc.
EBP50 — sealed or ported calc.
Sensitivity, 1 W / 1 m88.9 dB calc.

General

Size12″
Voice coils4 Ω
RMS power200 W

Mounting dimensions

Ø≈ 12 1/4″cutout Ø11 1/16″mounting depth 5 3/16″magnet Ø≈ 7 3/16″
Cutout diameter11 1/16″
Mounting depth5 3/16″

“≈” 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 Alpine 12″ models