MTX Audio T5515-04

15″ subwoofer · 4 Ω · 300 W RMS

Fs 21.4 HzQts 0.56Vas 7.80 ft³Xmax 0.53″

Recommended box

For a sedan, one sub, 300 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 volume3.07 ft³ (87 L)
Qtc1.05
Fc40 Hz
F3 (−3 dB, no cabin gain)33 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 12 7/8″
Open sealed box in designer

Ported

Net volume5.23 ft³ (148 L)
Tuning (Fb)30 Hz
Portslot 1 9/16 × 16 5/16″, 10 3/8″ long
Port velocity at 300 W65 ft/s
F3 (−3 dB, no cabin gain)27 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 21 3/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs21.4 Hz
Qts0.56
Qes0.63
Qms4.85
Vas7.80 ft³
Re3.62 Ω
Sd135.2 in²
Xmax0.53″
Vd71.9 in³ calc.
Mms271 g calc.
BL14.5 T·m calc.
EBP34 — suits sealed calc.
Sensitivity, 1 W / 1 m87.3 dB calc.

General

Size15″
Voice coils4 Ω
RMS power300 W

Mounting dimensions

Ø15 7/16″cutout Ø13 7/8″mounting depth 7 9/16″magnet Ø≈ 9″
Cutout diameter13 7/8″
Mounting depth7 9/16″
Overall diameter15 7/16″

“≈” 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