MTX Audio RTS15-04

15″ subwoofer · 4 Ω · 300 W RMS

Fs 25.7 HzQts 0.62Vas 5.83 ft³Xmax 0.42″

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 volume2.97 ft³ (84 L)
Qtc1.07
Fc44 Hz
F3 (−3 dB, no cabin gain)36 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 12 1/2″
Open sealed box in designer

Ported

Net volume5.05 ft³ (143 L)
Tuning (Fb)33 Hz
Portslot 1 3/4 × 16 5/16″, 9 5/8″ long
Port velocity at 300 W60 ft/s
F3 (−3 dB, no cabin gain)29 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 20 9/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs25.7 Hz
Qts0.62
Qes0.705
Qms5.25
Vas5.83 ft³
Re3.79 Ω
Sd130.2 in²
Xmax0.42″
Vd54.8 in³ calc.
Mms232 g calc.
BL14.2 T·m calc.
EBP36 — suits sealed calc.
Sensitivity, 1 W / 1 m88 dB calc.

General

Size15″
Voice coils4 Ω
RMS power300 W

Mounting dimensions

Ø15 5/16″cutout Ø13 11/16″mounting depth 6 3/8″magnet Ø≈ 8 7/8″
Cutout diameter13 11/16″
Mounting depth6 3/8″
Overall diameter15 5/16″

“≈” 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