Treo TS15.4

15″ subwoofer · 4 Ω · 250 W RMS

Fs 21.1 HzQts 0.53Vas 6.10 ft³Xmax 0.87″

Recommended box

For a sedan, one sub, 250 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 volume2.58 ft³ (73 L)
Qtc0.98
Fc39 Hz
F3 (−3 dB, no cabin gain)33 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 11 1/8″
Open sealed box in designer

Ported

Net volume4.38 ft³ (124 L)
Tuning (Fb)29 Hz
Portslot 1 9/16 × 16 5/16″, 14 7/16″ long
Port velocity at 250 W56 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 18 1/2″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs21.1 Hz
Qts0.53
Qes0.571
Qms7.77
Vas6.10 ft³
Re4 Ω
Sd113.2 in²
Xmax0.87″
Vd98.1 in³ calc.
Mms248 g calc.
BL15.2 T·m calc.
EBP37 — suits sealed calc.
Sensitivity, 1 W / 1 m86.6 dB calc.

General

Size15″
Voice coils4 Ω
RMS power250 W

Mounting dimensions

Ø15 1/2″cutout Ø13 5/8″mounting depth 6 3/4″magnet Ø≈ 8 7/8″
Cutout diameter13 5/8″
Mounting depth6 3/4″
Overall diameter15 1/2″

“≈” 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 Treo 15″ models