JL Audio Fathom® 13.5" Custom Theater Subwoofer (CTS-113-TT525-13TW5)

Reference In-Wall Low-Frequency System | Available at Trimira Audio

The JL Audio Fathom® CTS-113-TT525-13TW5 is an architectural in-wall subwoofer system designed to deliver high-output, reference-quality low-frequency performance while maintaining a discreet visual profile.

Built around JL Audio's 13TW5 13.5-inch thin-line subwoofer driver, the system combines an ultra-shallow enclosure with a rigid, internally braced cabinet designed for installation within architectural walls, acoustic baffle walls, and other custom-built structures.

At Trimira Audio, we recommend the Fathom CTS-113-TT525-13TW5 for high-end dedicated home cinemas and media rooms where powerful sub-bass performance needs to be integrated discreetly into the architecture.

Key Features & Technological Innovations

Patented 13TW5 13.5-Inch Thin-Line Driver

At the heart of the system is JL Audio's 13TW5 thin-line subwoofer driver.

Its shallow motor structure allows substantial excursion capability within an installation-friendly form factor, providing the foundation for deep, high-output low-frequency reproduction.

Ultra-Shallow 5.25-Inch Enclosure

The enclosure is only 5.25 inches (133 mm) deep, making it suitable for applications where conventional freestanding subwoofers would consume valuable floor space.

The design can be incorporated into:

• 2×6 stud-wall constructions
• Acoustic fabric walls
• Custom cinema baffles
• Dedicated architectural subwoofer cavities

Rigid CNC-Machined Enclosure

The cabinet uses a rigid MDF construction with substantial internal bracing.

This is designed to reduce unwanted cabinet movement and resonance while providing a stable mechanical platform for the 13TW5 driver.

Vibration-Isolation Mounting

Specialised mounting hardware and isolation elements are designed to reduce mechanical energy transfer into surrounding wall structures.

This can be particularly valuable in architectural installations where structural vibration and sound transmission to adjacent rooms are important considerations.

External Amplification & DSP

The passive CTS-113-TT525-13TW5 requires a compatible external JL Audio amplification/DSP system.

This allows the subwoofer to be integrated with an appropriately configured Fathom amplifier or system-controller architecture for level, crossover, equalisation, and room-specific optimisation.

Technical Specifications

Architectural Installation

The CTS-113-TT525-13TW5 is intended to become part of the room rather than remain visible as a conventional subwoofer.

Before installation, the wall or baffle structure should be designed around the enclosure dimensions, mounting requirements, cable routing, and the acoustic requirements of the room.

For a dedicated cinema, Trimira Audio can assist with:

• Stud-bay planning
• Baffle-wall integration
• Acoustic-fabric installation
• Amplifier matching
• Subwoofer positioning
• DSP configuration
• Multi-subwoofer system design
• Room-calibration planning

Consult with the Custom Integration Specialists at Trimira Audio

The JL Audio Fathom CTS-113-TT525-13TW5 is designed for installations where cinema-scale low-frequency performance and architectural discretion are equally important.

Trimira Audio can assist with the complete installation, from wall construction and enclosure placement through to external amplification, DSP configuration, and final room calibration.

For a truly integrated cinema installation, the CTS-113-TT525-13TW5 provides a powerful alternative to conventional floorstanding subwoofers while keeping the low-frequency system concealed within the room architecture.