Swat HLG-12D2

12″ subwoofer · dual 2 Ω · 2,500 W RMS

Fs 30 HzQts 0.26Vas 1.01 ft³Xmax 1.30″

Recommended box

For a sedan, one sub, 2,500 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 volume0.88 ft³ (25 L)
Qtc0.38
Fc44 Hz
F3 (−3 dB, no cabin gain)100 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 11 5/16″
Open sealed box in designer

Ported

Net volume1.52 ft³ (43 L)
Tuning (Fb)26 Hz
Port2 round ports Ø2 1/2″, 24 1/8″ long
Port velocity at 2,500 W321 ft/s
F3 (−3 dB, no cabin gain)87 Hz
Example box (outside)23 7/16″ × 15 3/4″ × 11 7/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs30 Hz
Qts0.26
Qes0.272
Qms6
Vas1.01 ft³
Re (one coil)≈ 1.7 Ω
Sd79.8 in²
Xmax1.30″
Vd103.7 in³ calc.
Mms371 g calc.
BL20.9 T·m calc.
EBP110 — suits ported calc.
Sensitivity, 1 W / 1 m86.5 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power2,500 W

Mounting dimensions

Ø≈ 12 3/8″cutout Ø11 1/4″mounting depth 8 7/8″magnet Ø≈ 7 5/16″
Cutout diameter11 1/4″
Mounting depth8 7/8″

Only Qts is published — Qms assumed to be 6 and Qes calculated (barely affects box design).

“≈” 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 Swat 12″ models