MTX Audio T9512-44

12″ subwoofer · dual 4 Ω · 1,000 W RMS

Fs 36.4 HzQts 0.56Vas 0.90 ft³Xmax 1.00″

Recommended box

For a sedan, one sub, 1,000 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 volume0.92 ft³ (26 L)
Qtc0.79
Fc51 Hz
F3 (−3 dB, no cabin gain)49 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 12 5/16″
Open sealed box in designer

Ported

Net volume2.58 ft³ (73 L)
Tuning (Fb)29 Hz
Portslot 2 15/16 × 14 5/16″, 46 13/16″ long
Port velocity at 1,000 W62 ft/s
F3 (−3 dB, no cabin gain)25 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 17 5/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs36.4 Hz
Qts0.56
Qes0.67
Qms3.41
Vas0.90 ft³
Re (one coil)3.78 Ω
Sd83 in²
Xmax1.00″
Vd83.3 in³ calc.
Mms303 g calc.
BL19.8 T·m calc.
EBP54 — sealed or ported calc.
Sensitivity, 1 W / 1 m84.7 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power1,000 W

Mounting dimensions

Ø12 15/16″cutout Ø11 1/16″mounting depth 9 3/4″magnet Ø≈ 7 3/16″
Cutout diameter11 1/16″
Mounting depth9 3/4″
Overall diameter12 15/16″

“≈” 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