Rockford Fosgate Power T2D215

15″ subwoofer · dual 2 Ω · 1,200 W RMS

Fs 31 HzQts 0.52Vas 1.71 ft³Xmax 0.87″

Recommended box

For a sedan, one sub, 1,200 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 volume1.34 ft³ (38 L)
Qtc0.79
Fc47 Hz
F3 (−3 dB, no cabin gain)45 Hz
Example box (outside)16 15/16″ × 16 15/16″ × 12 5/16″
Open sealed box in designer

Ported

Net volume3.99 ft³ (113 L)
Tuning (Fb)26 Hz
Portslot 3 3/8 × 16 5/16″, 47 15/16″ long
Port velocity at 1,200 W62 ft/s
F3 (−3 dB, no cabin gain)23 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 22 5/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs31 Hz
Qts0.52
Qes0.58
Qms5.29
Vas1.71 ft³
Re (one coil)1.7 Ω
Sd116.3 in²
Xmax0.87″
Vd101.1 in³ calc.
Mms434 g calc.
BL15.7 T·m calc.
EBP53 — sealed or ported calc.
Sensitivity, 1 W / 1 m86 dB calc.

General

Size15″
Voice coilsdual 2 Ω
RMS power1,200 W

Mounting dimensions

Ø≈ 14 15/16″cutout Ø13 3/4″mounting depth 9 13/16″magnet Ø≈ 8 15/16″
Cutout diameter13 3/4″
Mounting depth9 13/16″

“≈” 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 Rockford Fosgate 15″ models