Audio Reviews

Rockford Fosgate Power T1 Extensive function test

In this article: We’re going to take a close look at one of Rockford Fosgate’s biggest and worst subwoofers, the Power T1 series. This article gives you all the details you can find when comparing subwoofers strategically.

Overview of the Rockford Fosgate Power T1 series subwoofers

The Rockford Fosgate T1 Series subwoofers are designed to give you the hardest, bestial bass possible. If you want to rock the block, the Power T1 is the solution. The T1 has been redesigned from the ground up to give you the optimal strength and performance. It’s the subwoofer you want when you’re looking for massive bass.

bass cone and surround

Lightweight and durable, the Kevlar-reinforced, aluminized woofer cone is optimally designed to reproduce deep, low-frequency sound. Coupled with the proprietary high-excursion thermo-rubber surround, the cone and surround design allow these subwoofers to perform with the performance you would expect from a larger speaker. Rockford Fosgate uses a tall and narrow roller design that increases the woofer cone area by up to 25 percent. This not only allows the sub to hit the lowest frequencies, but the oversized cone also ensures maximum resilience.

The aluminized dust cap is bonded to the cone to create a triangular shape called the Parabolic Triangular Cone Geometry Support System. This design ensures that the cone and surround are always in the optimal position to handle many deflections without unwanted cone distortion.

Double spiders and support ring

Rockford Fosgate uses a tear-resistant, mirror-image, dual-spider design that provides the voice coil with linear stability and optimal cooling. The addition of a special spun-lace Nomex support ring mated to the spider ensures the subs can handle lots and lots of power without fatiguing those hard-wearing areas for excellent durability.

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Regular sewing of the tinsel connector wire reduces one of the major wear points in a subwoofer and eliminates distortion caused by contact of the tinsel wires inside the subwoofer.

voice coils and magnets

The dual voice coils Rockford Fosgate uses are aluminum and case hardened, then spun in copper wire to ensure the coils can handle heat and current. A hard-anodized finish on the voice coil formers ensures that there is no distortion or deflection under high loads and over long periods of time. This design makes the T1 a very durable subwoofer that can take a lot of abuse.

The T1 uses massive 120mm double-stack magnets that ensure the right magnetic fields at all deflection angles to produce optimal sound under heavy loads.

Basket design & decorative ring

The Power T1 uses a cast aluminum alloy basket which not only looks cool but keeps the subwoofer stable at all power levels and provides cooling air paths to the spider and voice coil to ensure the subwoofer does not overheat at high volume levels.

It also features what Rockford calls a slot-mount frame design, which allows you to fine-tune the subwoofer’s position once you’ve loosely mounted it via slots in the frame (vs. simple screw holes). Once you’ve installed the subwoofer in a suitable ported or sealed ported subwoofer enclosure, an included trim ring snaps into place to cover the mounting screws and provide a clean, finished appearance.

Proper Reinforcement

To get the deep, hard-hitting bass you want, you need a quality amplifier. Rockford Fosgate designed the Power T1 Series subwoofers to work flawlessly with the company’s Power Series amplifiers, ensuring you get the results you want without having to try a number of different amplifiers.

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main features

  • 10″, 12″ and 15″ versions available
  • Both standard and slim designs available
  • Two 2 ohm or 4 ohm voice coils
  • Aluminized Kevlar-reinforced woofer cone
  • High roll edging
  • Aluminized dust cap
  • Anodized voice coil and shaper
  • Dual spider design with integrated locking ring
  • Double stacked magnets
  • Including decorative ring
  • Slot Loaded Terminals, up to 8 AWG
  • Aluminum alloy basket
Does the T1 work in a compact box?

The Power T1 series is optimized for larger subwoofer boxes depending on the size of the speaker. The 12″ and 10″ subwoofers are available as Slim Line and are therefore suitable for compact underseat boxes.

Which subwoofer was replaced by the Power T1?

The Power T1 is an all new design that complements other Rockford Fosgate power speakers, subwoofers and amplifiers.

Are the slim line subwoofers as loud as the full size designs?

There is a slight drop in power handling from the slimline speakers and a resulting difference in overall excursion, but the difference is minimal enough that you probably won’t notice it.

what others say

As with some of the subwoofers on our best subwoofers list today, it’s terribly difficult to find anyone who has anything negative to say about this subwoofer. Most installers were looking for hair-raising bass, and that’s exactly what they got with these. Many installers have found that they are forced to turn down the power to these subs because they are so loud that they can even cause hearing damage.


If you’re looking for big, big bass, this is the way to go. We recommend using a head unit and amplifier that can be remotely controlled to hear the full power availability of these subwoofers. The combination of technologies and Rockford Fosgate’s commitment to producing the bass you want makes this a fantastic option.

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Joshua Elliott
Bacon practitioner. Certified coffee fan. Lifelong food junkie. Web trailblazer. Typical internet fanatic.

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