MTX Audio 5512-22

12″ subwoofer · dual 2 Ω · 400 W RMS

Fs 34 HzQts 0.69Vas 1.57 ft³Xmax 0.60″

Recommended box

For a sedan, one sub, 400 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 volume1.98 ft³ (56 L)
Qtc0.92
Fc46 Hz
F3 (−3 dB, no cabin gain)39 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 9 3/4″
Open sealed box in designer

Ported

Net volume3.39 ft³ (96 L)
Tuning (Fb)31 Hz
Portslot 1 15/16 × 14 5/16″, 18 3/4″ long
Port velocity at 400 W62 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 17″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs34 Hz
Qts0.69
Qes0.863
Qms3.4
Vas1.57 ft³
Re (one coil)1.7 Ω
Sd87.4 in²
Xmax0.60″
Vd52.3 in³ calc.
Mms222 g calc.
BL9.7 T·m calc.
EBP39 — suits sealed calc.
Sensitivity, 1 W / 1 m85.1 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power400 W

Mounting dimensions

Ø12 3/8″cutout Ø11 3/16″mounting depth 6 1/4″magnet Ø≈ 7 1/4″
Cutout diameter11 3/16″
Mounting depth6 1/4″
Overall diameter12 3/8″

“≈” 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.

Data sources

Other MTX Audio 12″ models