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Rockford Fosgate Power T1D212 12" dual 2-ohm voice coil component subwoofer

Item # 575T1D212

Rockford Fosgate engineered Power Series subs for ultimate high-power, high-volume bass.

Rockford Fosgate engineered Power Series subs for ultimate high-power, high-volume bass.

9 questions - 9 answers

Item # 575T1D212

Low stock
$449.99 -$43.87 Outlet savings
$406.12 each

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About the Rockford Fosgate Power T1D212

Bob Bihlmayer

Crowd-drawing bass beats

Rockford Fosgate engineered Power Series subs for ultimate high-power, high-volume bass. The Power Series T1D212 12" subwoofer features a responsive paper cone that's reinforced with the same Kevlar® fibers used in bulletproof vests. A hard anodized aluminum dust cap covers and protects the entire cone, showcasing the glossy Rockford Fosgate logo. The result? You get classic warm bass from a cone that's virtually indestructible.

Crowd-drawing bass beats

Rockford Fosgate engineered Power Series subs for ultimate high-power, high-volume bass. The Power Series T1D212 12" subwoofer features a responsive paper cone that's reinforced with the same Kevlar® fibers used in bulletproof vests. A hard anodized aluminum dust cap covers and protects the entire cone, showcasing the glossy Rockford Fosgate logo. The result? You get classic warm bass from a cone that's virtually indestructible.

More cone area = more bass

Rockford Fosgate uses their patented VAST technique to attach the oversized rubber surround to the cone that increases available cone area up to 25%, so this sub can push more air for even bigger bass.

Extended excursion

A hefty cast aluminum frame provides a stable platform for extreme cone excursion, while an extended pole piece and bumped backplate allow the sub to hit deeper lows without "bottoming out." Special venting in the frame keeps the aluminum voice coils cool through heavy use for consistent bass performance over time.

Fuse-protected impedance selection

Rockford Fosgate outfits Power Series subs with their unique SWIFT™ terminals, which lets you build exactly the system you want — high-power or multi-sub — without complicated wiring. Just rotate the impedance selection jumper to safely choose between 1 or 4 ohms. If you're thinking about adding another sub down the line, this impedance selector simplifies reconfiguring your system.

The jumper is also fused to protect your sub from accidental overload. These subs work equally well in a sealed or ported enclosure, so you can choose the kind of bass you want for your system.

Subwoofer Wiring Diagrams

To see sample wiring diagrams for all common subwoofer/amplifier combinations, check out this informative article.

READ LESS

Product highlights:

  • 12" dual voice coil subwoofer with selectable 1- or 4-ohm impedance
  • Kevlar® reinforced paper cone with aluminum dust cap
  • rubber surround
  • cast aluminum basket
  • metal grille included
  • power handling: 800 watts RMS (1600 watts peak power)
  • sensitivity: 85 dB
  • top-mount depth: 6-3/4"
  • warranty: 1 year
  • MFR # T1D212

What's in the box:

  • 12" Dual 2-ohm voice coil subwoofer
  • Grille
  • Fused 1-ohm/4-ohm SWIFT jumper (installed)
  • Non-fused 1-ohm/4-ohm SWIFT jumper (not installed)
  • Twelve 1-3/4" Allen head screws
  • 4mm Allen head bit
  • Installation/Operation manual (English/ French/ Spanish/ German)

Scratch & Dent items may be missing non-essential accessories. In some cases the manufacturer's accessories have been replaced with generic equivalents.

See the difference between "Open Box" and "Scratch & Dent" Outlet items

Customer reviews for Rockford Fosgate Power T1D212

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More details on the Rockford Fosgate Power T1D212

Pat M.

Product Research

Features
Enclosure Compatibility

Features

Dual 2Ω Voice Coils: The Rockford Fosgate T1D212 subwoofer features dual 2Ω voice coils and a jumper to easily wire them in series or parallel, presenting either a 1Ω or 4Ω load; the voice coils cannot be easily wired separately.

SWIFT Terminal: 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 1Ω position the voice coils are wired in parallel; with the jumper in the 4Ω position the voice coils are wired in series.

Note: A second jumper is included with the subwoofer, described in the manual as non-fused. Visually, however, this jumper also appears to be fused, but at a higher threshold than the factory installed jumper (possibly high enough to make it effectively non-fused).

Woofer: The Kevlar fiber reinforced paper cone has a hard anodized aluminum dust cap of equivalent size; the result is a lightweight and extremely strong cone, reducing piston flex and cone distortion.

VAST Surround: The Vertical Attach Surround Technique (VAST) increases a speaker's effective radiating cone area without increasing the size of the basket.

Voice Coil Former: Aluminum voice coil formers offer superior heat dissipation over other commonly used materials. The hard-anodized finish increases the former strength. These two factors combine to improve the overall power handling characteristics of the subwoofer.

Cast Aluminum Basket: The basket is a die-cast aluminum design to add rigidity and eliminate multiple acoustic resonances. Additionally, the large aluminum mass helps reduce voice coil former temperature and increase power handling.

Terminals: The proprietary spring terminals will accept bare wire up to 8-gauge.

Grille: A metal grille is included to protect the subwoofer and add a finished look. If the sub is bottom mounted and the back is visible, the grille can be disassembled and just the trim ring can be installed to cover the mounting screws.

CEA-2031 Compliant: Power handling on the T1D212 subwoofer conforms to CEA-2031 industry standards. This means the subwoofer has the capacity to handle its rated power under continuous demand, not just for an instant.

Klippel Verified: The Klippel distortion analyzer, a device that uses a laser and sophisticated software to do large-scale analysis of drivers in motion, lets Rockford Fosgate optimize the subwoofer's motor structure, voice coil alignment, and suspension to yield the best possible performance.

Inductive Damping Heat Sink: The Inductive Damping Heat Sink (IDHS) secures directly to the top of the magnet structure to improve system efficiency by reducing both distortion and back EMF (Electro-Magnetic force). It also radiates heat to reduce the voice coil temperature.

FlexFit Basket: The Flex Fit frame utilizes slots (where possible) instead of single screw sized holes; allowing slight adjustment of the speaker when mounted.

Enclosure Compatibility

Sealed Box: When using a sealed enclosure, Rockford recommends an internal volume of 1.25 cubic feet. Sealed enclosures provide the most control over a woofer, will handle a lot of power, and provide accurate sonic reproduction, making them suitable to all types of music.

Ported Box: Two ported enclosures are recommended:

  • Optimum: internal volume of 1.75 cubic feet using one 4" diameter x 9" long port; this yields a tuning frequency of 40 Hz and a -3 dB point of 32 Hz
  • High Output: internal volume of 2.25 cubic feet using a 3" x 13-3/4" x 25-3/4" slot port; this yields a tuning frequency of 40 Hz

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Customer Q&A

9 questions already asked

Q
What is the diameter of the bottom of the sub?
tony  Feb 21, 2023
1 answer
A
Greetings Tony, and thank you for your question. In this subwoofers case the spec would still be called magnet diameter, even though the magnet is covered. At its widest point at the very bottom, its 9.48 inches.
hogan  Feb 21, 2023 (Staff)
Q
Where can I buy a replacement grill?
kameron  Jan 23, 2022
2 answers
A
From the manufacture
kevin  Jan 23, 2022
A
I would think Rockford direct or crutchfield. Should be a part number in the manual for that grill.
chris  Jan 23, 2022
Q
Where can I buy a replacement grill?
kameron  Jan 23, 2022
1 answer
A
Crutchfield does not have the grilles separately. I would recommend checking at Rockford's main corporate site or you can give them a call. Their customer service number is 800-669-9899.
kenneth  Jan 25, 2022 (Staff)
Q
What is the frequency response?
sean  Feb 07, 2021
1 answer
A
Frequency response for most subs is pretty wide (20-200hz) for example, if you are looking for tuning frequency for a vented box this subwoofer is optimal at 40hz per the users manual.
matthew  Feb 07, 2021
Q
I purchased 2 of these subs recently. Now how much power from an amplifier will I need to handle this?
cuyler  Sep 03, 2020
1 answer
A
Two of these subwoofers can be powered by an amp that outputs 1120-1600 watts RMS at 2 ohms. We have advisors that can help recommend an amp that outputs this power and has any other abilities that are needed to make it work in your system. You can reach one to by calling 1-800-324-9695 to get a personal recommendation on an amp.
jason  Sep 21, 2020 (Staff)
Q
What is the diameter of the bottom of the magnet subwoofer?
gabrial  Sep 02, 2020
1 answer
A
Not to sure but they work great I had 2 cvx kickers before and there nothing like them a way step up from 2 cxvs
joseph  Sep 02, 2020
Q
What size box would I put a single 12" in? I have mine in a 1.5 ported but I think it needs at least 2 cubic feet.
elijah  Sep 27, 2019
1 answer
A
The ideal sealed box volume is 1.25 cubic feet, while the ideal ported box volume is 1.75 cubic feet.
thomas  Oct 09, 2019 (Staff)
Q
how do I switch the swift terminals? should I use the jumper with fuses or no fuses?
justin  Jan 29, 2019
1 answer
A
The jumper needs to be set so the ohms you need the subwoofer to run at lines up with the arrow on the subwoofer. As for which jumper, fused or non-fused, to use, I recommend using the fused jumpers unless you are able to do or to have someone do a professional setup and calibration of the system My Bio: https://www.crutchfield.com/bio/Paul
jason  Feb 02, 2019 (Staff)
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