MTX Audio T8154

15″ subwoofer · 4 Ω · 500 W RMS

Fs 24.6 HzQts 0.37Vas 5.14 ft³Xmax 0.49″

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 volume1.45 ft³ (41 L)
Qtc0.80
Fc52 Hz
F3 (−3 dB, no cabin gain)50 Hz
Example box (outside)17 5/16″ × 17 5/16″ × 12 1/2″
Open sealed box in designer

Ported

Net volume4.56 ft³ (129 L)
Tuning (Fb)28 Hz
Portslot 2 3/16 × 16 11/16″, 22 1/16″ long
Port velocity at 500 W63 ft/s
F3 (−3 dB, no cabin gain)27 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 19 11/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs24.6 Hz
Qts0.37
Qes0.4
Qms5.69
Vas5.14 ft³
Re3.83 Ω
Sd138.3 in²
Xmax0.49″
Vd68 in³ calc.
Mms324 g calc.
BL21.9 T·m calc.
EBP62 — sealed or ported calc.
Sensitivity, 1 W / 1 m89.3 dB calc.

General

Size15″
Voice coils4 Ω
RMS power500 W

Mounting dimensions

Ø15 11/16″cutout Ø14″mounting depth 6 7/8″magnet Ø≈ 9 1/8″
Cutout diameter14″
Mounting depth6 7/8″
Overall diameter15 11/16″

“≈” 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 15″ models