MTX Audio T8512-04

12″ subwoofer · 4 Ω · 500 W RMS

Fs 36.4 HzQts 0.59Vas 1.29 ft³Xmax 0.85″

Recommended box

For a sedan, one sub, 500 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 volume1.48 ft³ (42 L)
Qtc0.80
Fc50 Hz
F3 (−3 dB, no cabin gain)46 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 18 5/16″
Open sealed box in designer

Ported

Net volume3.35 ft³ (95 L)
Tuning (Fb)30 Hz
Portslot 2 3/8 × 14 5/16″, 25 3/16″ long
Port velocity at 500 W61 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 17 11/16″
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
Qts0.59
Qes0.72
Qms3.16
Vas1.29 ft³
Re3.21 Ω
Sd86.6 in²
Xmax0.85″
Vd73.6 in³ calc.
Mms233 g calc.
BL15.4 T·m calc.
EBP50 — sealed or ported calc.
Sensitivity, 1 W / 1 m85.9 dB calc.

General

Size12″
Voice coils4 Ω
RMS power500 W

Mounting dimensions

Ø12 15/16″cutout Ø11 1/16″mounting depth 7 3/4″magnet Ø≈ 7 3/16″
Cutout diameter11 1/16″
Mounting depth7 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