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Rockford Fosgate T1D412 Power 12″ T1 4-Ohm DVC Subwoofer

Brand: Rockford Fosgate
Model Number: T1D412
UPC: 780687328948
Rockford Fosgate
Model Number: T1D412
UPC: 780687328948

Rockford Fosgate T1D412 Power 12″ T1 4-Ohm DVC Subwoofer

  • Symmetrical dual progressive roll tear resistant poly-cotton spiders
  • Proprietary 8 AWG insulated allmetal input spring terminal connection
  • Optimized and matched magnetic and complicance geometry
  • Periodic-stitched fatigue resistant tinsel lead wire
  • High-temp voice coil with spun-laced Nomex® re-inforcement collar
  • Anodized aluminum heat sinking dust cap
  • Kevlar fiber reinforced paper cone
  • Rigid die-cast aluminum basket
  • Optimized pole piece and spider venting
  • Anodized aluminum voice coil former / copper clad aluminum wire

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Product Description

Features & Specifications



Rockford Fosgate T1D412 Power 12″ T1 4-Ohm DVC Subwoofer

Rockford Fosgate designed Power Series subs deliver crowd-drawing bass for ultimate high-power, high-volume bass. The Rockford Fosgate T1D412 12″ subwoofer has a responsive paper cone reinforced with the same Kevlar® fibres found in bulletproof vests. The entire cone is covered and protected by a hard anodized aluminum dust cap that displays the glossy Rockford Fosgate emblem. What’s the end result? From a nearly unbreakable cone, you get traditional warm bass.

More bass equals more cone area.

The Rockford Fosgate T1D412 enlarged rubber surround is attached to the cone using Rockford Fosgate’s patented VAST process, which increases usable cone area by 25%, allowing this sub to push more air for even more bass.

Extensive journey

An extended pole piece and bumped backplate give the sub a sturdy base for intense cone excursion, while a longer pole piece and bumped backplate allow it to hit deeper lows without “bottoming out.” The aluminium voice coils are kept cool by special ventilation in the frame, resulting in consistent bass performance throughout time.

Impedance selection with fuse protection

Power Series subs are equipped with Rockford Fosgate’s innovative SWIFTTM terminals, which allow you to design exactly the system you want – high-power or multi-sub — without having to deal with intricate wiring. To choose between 1 and 4 ohms, simply rotate the impedance selection jumper. This impedance selector makes it easier to reconfigure your system if you decide to add another sub later.

The jumper is additionally fused to prevent inadvertent overloading of your sub. You may use these subs in either a sealed or ported enclosure, so you can get the bass you want for your system.

Dual 4 Voice Coils

The Rockford Fosgate T1D412 subwoofer has dual 4 voice coils with a jumper to connect them in series or parallel, presenting a 2 or 8 load; the voice coils cannot be wired independently.

SWIFT Terminal (Selectable Woofer Impedance Fused Termination)

Rockford’s proprietary SWIFT Terminal (Selectable Woofer Impedance Fused Termination) offers a simple and convenient method of setting the impedance presented by the dual voice coil subwoofer. The impedance jumper also provides fused protection from severe overload conditions. With the jumper in the 2Ω position the voice coils are wired in parallel; with the jumper in the 8Ω position the voice coils are wired in series.


Please consult your amplifier owner’s manual for lowest recommended impedance for the Rockford Fosgate T1D412.

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Brand Rockford Fosgate   Model Rockford Fosgate T1D412
Product: Rockford Fosgate T1D412 Power 12" T1 4-Ohm DVC Subwoofer

4 Ω

RMS Power

1201 to 1600 Watts

Car Subwoofer Features

Dual Voice Coil

Car Subwoofer Size



Size 12 -inch
Impedance 4 ohms
Cone Material Kevlar-Reinforced Paper
Surround Material Rubber
Ideal Sealed Box Volume (cubic feet) 1.25
Ideal Ported Box Volume (cubic feet) 1.75
Port diameter (inches) 4
Port length (inches) 9
Free-Air No
Dual Voice Coil Yes
Sensitivity 86 dB at 1 watt
Frequency Response —
Max RMS Power Handling 800
Peak Power Handling (Watts) 1600
Top Mount Depth (inches) 6 15/16
Bottom Mount Depth (inches) 7 7/16
Cutout Diameter or Length (inches) 11 3/16
Vas (liters) 43.2
Fs (Hz) 33
Qts 0.61
Xmax (millimeters) 16.4

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Rockford Fosgate offers a 1 year limited warranty


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