Mmats Juggernaut 12 D2

12″ subwoofer · dual 2 Ω · 2,000 W RMS

Fs 49 HzQts 0.37Vas 0.81 ft³Xmax 0.50″

Recommended box

For a sedan, one sub, 2,000 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 volume	0.74 ft³ (21 L)
Qtc	0.54
Fc	71 Hz
F3 (−3 dB, no cabin gain)	102 Hz
Example box (outside)	14 3/16″ × 14 3/16″ × 10 7/16″

Open sealed box in designer

Ported

Net volume	1.55 ft³ (44 L)
Tuning (Fb)	41 Hz
Port	slot 3 3/8 × 14 5/16″, 43 3/8″ long
Port velocity at 2,000 W	72 ft/s
F3 (−3 dB, no cabin gain)	39 Hz
Example box (outside)	31 1/2″ × 15 3/4″ × 13 5/8″

Open ported box in designer

Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs	49 Hz
Qts	0.37
Qes	0.421
Qms	3.32
Vas	0.81 ft³
Re (one coil)	2.06 Ω
Sd	80.4 in²
Xmax	0.50″
Vd	40.2 in³ calc.
Mms	175 g calc.
BL	16.2 T·m calc.
EBP	116 — suits ported calc.
Sensitivity, 1 W / 1 m	90.1 dB calc.

General

Size	12″
Voice coils	dual 2 Ω
RMS power	2,000 W

Mounting dimensions

Cutout diameter	11 3/16″
Mounting depth	6″
Overall diameter	12 5/8″

“≈” 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.