Rockford Fosgate Power T0D212

12″ subwoofer · dual 2 Ω · 700 W RMS

Fs 25.3 HzQts 0.47Vas 1.94 ft³Xmax 0.55″

Recommended box

For a sedan, one sub, 700 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 volume1.06 ft³ (30 L)
Qtc0.80
Fc43 Hz
F3 (−3 dB, no cabin gain)41 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 13 1/16″
Open sealed box in designer

Ported

Net volume3.28 ft³ (93 L)
Tuning (Fb)25 Hz
Portslot 2 9/16 × 14 5/16″, 42 3/4″ long
Port velocity at 700 W62 ft/s
F3 (−3 dB, no cabin gain)22 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 19 1/2″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs25.3 Hz
Qts0.47
Qes0.51
Qms6.5
Vas1.94 ft³
Re (one coil)1.75 Ω
Sd84.9 in²
Xmax0.55″
Vd46.8 in³ calc.
Mms306 g calc.
BL12.9 T·m calc.
EBP50 — suits sealed calc.
Sensitivity, 1 W / 1 m84.4 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power700 W

Mounting dimensions

Ø≈ 12 3/8″cutout Ø11 1/4″mounting depth 6 7/8″magnet Ø≈ 7 5/16″
Cutout diameter11 1/4″
Mounting depth6 7/8″

“≈” 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 12″ models