MTX Audio 7512-44

12″ subwoofer · dual 4 Ω · 750 W RMS

Fs 32 HzQts 0.65Vas 1.76 ft³Xmax 0.66″

Recommended box

For a sedan, one sub, 750 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 volume2.01 ft³ (57 L)
Qtc0.89
Fc44 Hz
F3 (−3 dB, no cabin gain)38 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 9 15/16″
Open sealed box in designer

Ported

Net volume3.39 ft³ (96 L)
Tuning (Fb)30 Hz
Portslot 2 3/4 × 14 5/16″, 29 7/16″ long
Port velocity at 750 W61 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 18 11/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs32 Hz
Qts0.65
Qes0.764
Qms4.34
Vas1.76 ft³
Re (one coil)3.3 Ω
Sd87.9 in²
Xmax0.66″
Vd57.8 in³ calc.
Mms226 g calc.
BL14 T·m calc.
EBP42 — suits sealed calc.
Sensitivity, 1 W / 1 m85.3 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power750 W

Mounting dimensions

Ø12 3/4″cutout Ø11 3/16″mounting depth 7 7/16″magnet Ø≈ 7 1/4″
Cutout diameter11 3/16″
Mounting depth7 7/16″
Overall diameter12 3/4″

“≈” 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