Rockford Fosgate Power T1 Slim Single 1-Ohm Subwoofer - T1S1-12

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The Power T1S1-12 is a slimline 12" subwoofer designed for spaces where traditional sized woofers will not fit. Features a single 1-ohm voice coil for simplified wiring configurations.


Need bass but don't have a lot of space?  How about more power handling than your average shallow subwoofer?  Well, the T1 "Slimline" subwoofers are not your average shallow, in fact, they have been painstakingly designed to near exact performance characteristics of traditional sized Power T1 subwoofers you're already familiar with. 

  • Carbon fiber/PMI/glass fiber cone with aluminum dustcap
  • Injection molded foam surround with VAST™
  • Dual Nomex progressive spiders with integrated lead wires
  • Aluminum diecast frame with integrated heat sink fins
  • Custom insulated push spring 10 AWG terminals
  • Dual wound 2.5" voice coil with interior/exterior windings
  • Encapsulating voice coil to former coupling technology (patent pending)
  • Detachable die cast aluminum trim ring
  • Vented pole piece
  • High temp high energy neodymium motor structure
  • Proprietary split yoke pass thru motor technology (patent pending)
  • Integrated copper cap heat sinking shorting ring (IDHS)
  • Optional grille insert available
  • Optimized for sealed enclosures
  • 1 Year Warranty


Encapsulated Voice Coil Coupling

Our EVCC (Encapsulated Voice Coil Coupling) technology connects to the woofers voice coil from both the top and bottom and provides a more secure mounting platform for both the dual spiders and cone assembly.


Power handling on Rockford Fosgate speakers conform to CEA-2031 industry standards.

Split Yoke Motor Technology

The unique motor structure design allows full excursion capabilities of the woofers voice coil while allowing an overall reduction in woofer mounting depth.

Klippel Verified

Klippel is a speaker certification program allowing us to deliver the best possible subwoofers.

Inductive Damping Heat Sink

Secures directly to the top of magnet structure to improve system efficiency by reducing both distortion and back EMF (Electo-Magnetic force). Also radiates heat to reduce voice coil temperature.

VAST Surround - Subs

The Vertical Attach Surround Technique significantly increases a subwoofer's effective radiating cone area up to 25%.

FlexFit Basket - Subwoofer

The slot mounted frame pattern allows fine-tuning of the subwoofer's mounting position.

Anodized Aluminum Voice Coil Former

Rockford Fosgate subwoofers use anodized aluminum voice coil formers that provide superior heat dissipation (up to 100° at full power levels). Unlike traditional plastic substitutions, aluminum acts like a heat-sink to quickly dissipate thermal build-up on the voice coil. This keeps subwoofers cool during high SPL conditions.

Stitched Tinsel Leads

Improved reliability and performance by reducing fatigue and possible shorting.

Magnet Weight (oz)14.42 oz. (0.41 Kg)
Voice Coil Diameter2.98" (75 mm)
Mounting Depth3.01 in. (76.5 mm)
Shipping Weight16.15 Lbs. (7.3 Kg.)
Fs (Hz)37
Xmax (mm)15
Woofer Displacement0.042 cu. ft. (1.2 Liters)
Nominal Impedance1-Ohm
Power Handling (Watts RMS)600 Watts RMS
1200 Watts Max
Speaker Connector10 AWG slot loaded
SPL (dB @ 1w/1m)84
Cutout Diameter11.22 in. (285 mm)
Re (Ohms)1.7
Le (mH)0.31
Vas (Liters)32.4
Sd (cm2)560
Subwoofer TypeShallow
Voice Coil TypeSingle Voice Coil
Sealed Box Volume (Vb)1.1 cu. ft. (31.1 Liters)
Vented Box Volume (Vb)2.0 cu. ft. (56.6 Liters)

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