JL Audio Fathom ICS-SYS-108 In-ceiling Subwoofer


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In-Ceiling Subwoofer System with Single 8-inch Subwoofer Driver, 300 watts

Created from the same innovative technologies used to develop our free-standing powered subwoofers, the Fathom® ICS in-ceiling subwoofer systems are engineered to deliver outstanding bass performance, with nearly unlimited placement freedom.

Purpose-built to disappear into the ceilings of most home audio/theatre environments, the 8-inch Fathom® ICS systems are designed to fit 2" x 6" or larger ceiling joists and a wide range of assembled joist widths while operating through very small grilles. The grille’s clever design accommodates all common drywall thicknesses and can be easily painted to match a room’s decor.

The subwoofer enclosures utilize extensive architectural features aimed at improving rigidity while keeping a very low profile and minimal wall thickness. Unique port design vents through a slot located at the perimeter of the driver mount to enhance efficiency and low-bass output. Inside the enclosure is a long-excursion, 8-inch thin-line woofer, built to exacting standards by JL Audio for the Fathom® ICS products.

Each 8-inch Fathom® ICS system is driven by a rack-mountable amplifier with up to 600 watts of clean power, programmed specifically for each system, and capable of driving up to two enclosures. A complete set of Fathom® signal processing features is also onboard, including our powerful, 18-band Digital Automatic Room Optimization (D.A.R.O.) system, and high-pass crossover outputs, all accessible via an easy-to-use, menu-driven interface and LCD display. Note: D.A.R.O. functionality requires an optional calibration microphone (sold separately).

The ICS-108 System fits 2" x 6" ceiling joists or larger, with assembled joists ranging from 16-inches to 25 1/2-inches on center. Consult your Authorized JL Audio Dealer for specific application information.

“There’s just no going back once you’ve heard a properly implemented subwoofer, and one that physically disappears along with great integration is fantastic. I never had the feeling bass was coming from a “hole in the ceiling,” so that aspect of the ICS is a major success.”

“Starting with the fast, plucky guitar style of Michael Hedges, from his Aerial Boundaries album, the ICS immediately impresses, with its ability to keep up with the main speakers effortlessly. On to a long playlist of hip hop, and electronica tracks confirm the audiophile pedigree that is part of every JL product. A barrage of heavy rock tracks reminds me that JL has also been a dominating force in car/boat audio as well. This sub definitely delivers the goods.”

“The overall performance of the JL ICS is impressive on every level. It provides powerful bass response, great musicality, and can rock the house when necessary. And for those with smaller living quarters, that can’t make the space for a larger JL product; the ICS is the perfect solution. With this in mind, we gave the JL ICS subwoofer system one of the Audiophile Apartment’s Product of the Year awards for 2019. It wins on multiple levels: value, sound quality, and concept. It doesn’t get any better than that.” - Tone Audio Review. Read the full review here.

  • Enclosure Type: Ported
  • Enclosure Finish: Black Texture-Coated
  • Frequency Response (Anechoic): 24.9 Hz - 109 Hz (± 1.5 dB) -3dB at 23.4 Hz / 118 Hz
  • Effective Piston Area (Sd): 0.0204 sq m
  • Effective Displacement: 0.78 L
  • Amplifier Power 300 W RMS short-term