MTX Audio TS8512-44

12″ subwoofer · dual 4 Ω · 750 W RMS

Fs 30.9 HzQts 0.78Vas 2.41 ft³Xmax 0.80″

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 volume2.47 ft³ (70 L)
Qtc1.10
Fc43 Hz
F3 (−3 dB, no cabin gain)34 Hz
Example box (outside)17 5/16″ × 17 5/16″ × 19 1/2″
Open sealed box in designer

Ported

Net volume4.20 ft³ (119 L)
Tuning (Fb)32 Hz
Portslot 2 9/16 × 16 11/16″, 21 1/8″ long
Port velocity at 750 W62 ft/s
F3 (−3 dB, no cabin gain)27 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 18 5/8″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs30.9 Hz
Qts0.78
Qes0.86
Qms8.53
Vas2.41 ft³
Re (one coil)3.22 Ω
Sd108.8 in²
Xmax0.80″
Vd87 in³ calc.
Mms271 g calc.
BL14 T·m calc.
EBP36 — suits sealed calc.
Sensitivity, 1 W / 1 m85.7 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power750 W

Mounting dimensions

≈ 15 3/16″ × ≈ 15 3/16″cutout ≈ 14″mounting depth 8 13/16″magnet Ø≈ 9 1/16″
Cutout (square, side)≈ 14″
Mounting depth8 13/16″

Judging by its value, the published Re is for both coils in parallel — converted to per coil.

“≈” 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