Rockford Fosgate T1S1-10 Power 10" T1 Slim Single 1-Ohm Subwoofer

10" Power T1 Slim 1-Ohm SVC, Carbon Fibre/PMI/Glass Fibre Sandwich Cone, Neodymium Motor, IDHS, Dual-Wound Interior/Exterior Voice Coil. Sealed Enclosures Only.

Product Overview

The Rockford Fosgate Power T1S1-10 is a 10" slimline subwoofer with a Single 1-Ohm voice coil engineered for installations where a traditional-depth subwoofer cannot fit, yet targeting the performance characteristics of the full-depth Power T1 series. It is optimised for sealed enclosures only.

The T1 Slim introduces construction technology not found elsewhere in this catalogue: a carbon fibre, PMI (polymethacrylimide) foam, and glass fibre multi-layer sandwich cone; a dual-wound 2.5" voice coil with interior and exterior windings using a patent-pending encapsulating coupling technology; a proprietary split yoke pass-through motor technology (patent pending); an integrated copper cap heat-sinking shorting ring (IDHS); a die-cast aluminium frame with integrated heat sink fins; and dual Nomex progressive spiders. The neodymium motor provides high efficiency in a compact package.

Key Specifications

• Subwoofer size: 10 inch (slim)
• Voice coil configuration: Single Voice Coil (SVC)
• Impedance: 1-Ohm
• Power handling (RMS): Not stated — confirm with Rockford Fosgate (publishability blocker)
• Voice coil: Dual wound, 2.5", interior and exterior windings
• Cone: Carbon fibre / PMI foam / glass fibre sandwich
• Dustcap: Aluminium
• Surround: Injection-moulded foam with VAST
• Spider: Dual Nomex progressive with integrated lead wires
• Frame: Die-cast aluminium with integrated heat sink fins
• Motor: High-temp, high-energy neodymium
• Motor technology: Proprietary split yoke pass-through (patent pending)
• Shorting ring: Integrated copper cap IDHS (heat-sinking)
• Coupling: Encapsulating voice coil to former (patent pending)
• Pole piece: Vented
• Input terminals: Custom insulated push spring 10-AWG — confirm type with Rockford Fosgate
• Trim ring: Detachable die-cast aluminium (optional grille)
• Enclosure compatibility: Sealed only ✓
• Sensitivity: Not specified — confirm with Rockford Fosgate
• Fs / Xmax / Qts: Not specified — confirm with Rockford Fosgate
• Mounting depth: Slim — exact depth not confirmed
• Cutout diameter: Not specified — confirm with Rockford Fosgate
• Enclosure volume: Not specified — confirm with Rockford Fosgate
• Sold as: Individual unit
• Warranty: Not specified — confirm with Rockford Fosgate

Features & Benefits

• Carbon Fibre / PMI / Glass Fibre Sandwich Cone — A three-layer structural composite cone: carbon fibre outer skin for high stiffness, PMI (polymethacrylimide) rigid foam core for low mass and shear stiffness, and glass fibre inner skin for structural closure. This is an aerospace-grade sandwich construction producing the highest cone stiffness-to-mass ratio of any subwoofer in this catalogue — resisting cone breakup modes over a wide excursion range. The aluminium dustcap assists with thermal management from the voice coil.
• Dual-Wound 2.5" Voice Coil — Interior and Exterior Windings — The voice coil is wound on both the interior and exterior surfaces of the 2.5" former — effectively doubling the winding length within the same axial space. This, combined with the patent-pending encapsulating coupling technology, is the core of Rockford Fosgate's claim that the T1 Slim achieves the long excursion travel needed to rival a full-depth subwoofer's output in a slimline motor configuration.
• Proprietary Split Yoke Pass-Through Motor Technology (Patent Pending) — The motor structure uses a split yoke design with pass-through ventilation — allowing the voice coil to travel through the motor structure with reduced magnetic flux drop-off at the extremes of excursion. This is the mechanical basis for the T1 Slim's claimed performance parity with traditional-depth T1 subwoofers.
• IDHS — Integrated Copper Cap Heat-Sinking Shorting Ring — The copper cap on the pole piece serves dual functions: as a shorting ring (Faraday ring) it reduces voice coil inductance variation, lowering distortion; as a heat sink it conducts heat from the pole piece gap into the aluminium frame's heat sink fins, extending thermal capacity under sustained power.
• Die-Cast Aluminium Frame with Integrated Heat Sink Fins — The die-cast aluminium frame is machined with heat sink fins — providing a direct thermal conduction path from the motor gap to the surrounding air. This is an active thermal management feature absent from standard subwoofer frames.
• Dual Nomex Progressive Spiders — Two spiders with a "progressive" compliance curve — the spring rate increases as the cone moves toward its excursion limit, providing a softer suspension at low levels and a firmer return at high excursion to control cone travel and prevent mechanical damage.
• Neodymium Motor — High-energy neodymium magnet provides high flux density in a compact assembly — contributing to the motor's ability to maintain performance characteristics in the slim format.
• VAST Injection-Moulded Foam Surround — VAST (Vertical Attach Surround Technique) increases effective radiating cone area. The injection-moulded foam surround is chosen for its controlled compliance geometry and resistance to temperature extremes — suited to the T1 Slim's enclosed installation environments.
• Sealed Enclosure Only — The T1S1-10 is optimised for sealed enclosures exclusively. Confirm the recommended net internal volume from the official Rockford Fosgate T1S1-10 datasheet.
• 1-Ohm Single Voice Coil — Simplified Wiring — The 1-Ohm SVC presents a single 1-Ohm load to the amplifier. Two T1S1-10 units in series = 2-Ohm. Most amplifiers require a minimum stable impedance of 1-Ohm or 2-Ohm — confirm before purchasing.

Technical Specs

Compatible With / Goes Well With

Enclosure — sealed only. Do not install in a vented enclosure.

Pairs well with:

• A mono amplifier rated stable at 1-Ohm with output matched to the T1S1-10's confirmed RMS (TBC)
• A sealed slim enclosure designed to Rockford Fosgate's recommended net internal volume (TBC)

Frequently Asked Questions

What makes the T1 Slim different from a standard shallow subwoofer?

The T1 Slim was engineered to approach the performance of a full-depth Power T1 subwoofer within a slimline format — a goal achieved through two patent-pending technologies: the dual-wound interior/exterior voice coil assembly and the split yoke pass-through motor. Combined, these allow the voice coil to travel further within the motor's magnetic field than a conventional shallow motor design, producing the excursion needed for deep bass output without the required depth.

What is the PMI foam in the sandwich cone?

PMI (polymethacrylimide) is a rigid closed-cell foam used extensively in aerospace and high-performance composites as a sandwich core material. Sandwiched between carbon fibre and glass fibre skins, the PMI core provides exceptional structural rigidity perpendicular to the cone face — resisting cone breakup at high excursion levels — while adding minimal mass. This is the most advanced cone construction in any subwoofer in this catalogue.

What does IDHS stand for and what does it do?

IDHS — Integrated Dual Heat Sinking — refers to the copper cap on the pole piece. The copper cap functions as both a Faraday ring (reducing voice coil inductance variation and distortion) and as a heat-sinking component, conducting thermal energy from the magnetic gap through the pole piece into the aluminium frame's heat sink fins. This dual role is the origin of the "Dual Heat Sinking" name.

Can the T1S1-10 be used in a vented enclosure?

No — the T1S1-10 is optimised for sealed enclosures only. Do not install in a vented enclosure.

What is the power handling of the T1S1-10?

Power handling (RMS) is not stated in the supplier description or features list. This is a critical purchasing specification — confirm with Rockford Fosgate from the official T1S1-10 datasheet before purchasing to ensure amplifier matching.