Rockford Fosgate Power T0D415

15″ subwoofer · dual 4 Ω · 800 W RMS

Fs 26.2 HzQts 0.52Vas 3.33 ft³Xmax 0.58″

Recommended box

For a sedan, one sub, 800 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 volume2.44 ft³ (69 L)
Qtc0.80
Fc40 Hz
F3 (−3 dB, no cabin gain)38 Hz
Example box (outside)16 15/16″ × 16 15/16″ × 20 3/16″
Open sealed box in designer

Ported

Net volume5.09 ft³ (144 L)
Tuning (Fb)26 Hz
Portslot 2 3/4 × 16 5/16″, 29 3/8″ long
Port velocity at 800 W65 ft/s
F3 (−3 dB, no cabin gain)23 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 23 3/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs26.2 Hz
Qts0.52
Qes0.57
Qms6
Vas3.33 ft³
Re (one coil)3 Ω
Sd131 in²
Xmax0.58″
Vd76.3 in³ calc.
Mms395 g calc.
BL18.5 T·m calc.
EBP46 — suits sealed calc.
Sensitivity, 1 W / 1 m86.7 dB calc.

General

Size15″
Voice coilsdual 4 Ω
RMS power800 W

Mounting dimensions

Ø≈ 15 1/16″cutout Ø13 7/8″mounting depth 8 3/8″magnet Ø≈ 9 1/16″
Cutout diameter13 7/8″
Mounting depth8 3/8″

“≈” 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 Rockford Fosgate 15″ models