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

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SKU: T1S112
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Designed for Spaces Where Traditional Sized Woofers Will Not Fit


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.


We’re calling these “slim” subwoofers because they don’t take a lot of depth and offer bass response similar to a traditional sized model.  How can this be true?  Well, let’s just say the Wizards-of-Fos engineered an ingenious slotted voice coil assembly that exhibits long excursion travel.  Don’t worry, you don’t need to understand it, you just have to listen to how awesome they sound!


  • 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


  • Size 12″
  • Magnet Weight (oz) 14.42 oz. (0.41 Kg)
  • Voice Coil Diameter 2.98″ (75 mm)
  • Mounting Depth 3.01 in. (76.5 mm)
  • Shipping Weight 16.15 Lbs. (7.3 Kg.)
  • Fs (Hz) 37
  • Qes 1.17
  • Xmax (mm) 15
  • Woofer Displacement 0.042 cu. ft. (1.2 Liters)
  • Nominal Impedance 1-Ohm
  • Power Handling (Watts RMS) 600 Watts RMS, 1200 Watts Max
  • Speaker Connector 10 AWG slot loaded
  • SPL (dB @ 1w/1m) 84
  • Qts 1.06
  • Qms 11.22
  • Cutout Diameter 11.22 in. (285 mm)
  • Re (Ohms) 1.7
  • Le (mH) 0.31
  • CEA-2031 Compliant
  • Vas (Liters) 32.4
  • Sd (cm2) 560
  • Subwoofer Type Shallow
  • Voice Coil Type Single Voice Coil
  • Sealed Box Volume (Vb) 1.1 cu. ft. (31.1 Liters)
  • Vented Box Volume (Vb) 2.0 cu. ft. (56.6 Liters)

Rockford Fosgate T1S112 Specs

Weight 7.3 kg

Rockford Fosgate: Revolutionizing Audio in Automotive, Marine, and Motorcycle Industries

Rockford Fosgate, an iconic American brand, has carved a niche in the audio industry, particularly in automotive, marine, and motorcycle sectors. Known for their robust and high-quality audio products, Rockford Fosgate continues to innovate and provide exceptional sound systems that cater to audiophiles and enthusiasts who demand superior sound quality and durability in challenging environments.

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