JL Audio Fathom® ICS-SYS-108 8 Inch In-Ceiling Powered Subwoofer System

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In-Ceiling Subwoofer System with Single 8-inch Subwoofer, 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/theater 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. A 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 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.

  • Enclosure Finish: Flat Black (hidden from view when installed)
  • Grille finish: Primer White (paintable)
  • Enclosure Construction: CNC-Cut Birch Plywood

Specs:

General:
Enclosure Type Ported
Enclosure Finish Black Texture-Coated
Frequency Response (Anechoic) 24.9 Hz - 109 Hz (± 1.5 dB) -3dB at 24.6 Hz / 111 Hz -10dB at 23.4 Hz / 118 Hz
Effective Piston Area (Sd) 31.62 sq in / 0.0204 sq m
Effective Displacement 47.5 cu in / 0.78 L
Amplifier Power 300 W RMS short-term
Power Mode(s) Off, On or Automatic (Signal-Sensing or 12V Trigger)
12V Trigger Output Capacity 150 mA (1/8-inch/3.5mm mini jack)
Light Modes N/A

 

Signal Processing:
Unbalanced Inputs Stereo or Mono (two RCA jacks - Input Impedance of 50k Ohms)
Speaker/High-Level Inputs Stereo or Mono (removable plug - Input Impedance of 4.4k Ohms)
Input Grounding Isolated or Grounded
Level Control Reference (fixed gain) or Variable from -50dB to +15dB over reference gain (0.5 dB increments)
Filter Mode(s) Low-Pass, with tracking High-Pass Outputs
Filter Slope(s) 12/24 dB/octave
Filter Frequency Range 30 Hz - 130.1 Hz
Filter Defeat Function Yes
Polarity 0 or 180 degrees
Delay (Phase) Variable from 0 – 25 ms 
(0.1 ms increments, Sub and HP outputs)
Extreme Low Frequency (E.L.F.) Trim Variable, -12 dB to +3 dB at 25 Hz (0.5 dB increments)
Line Outputs Stereo or Mono (two RCA jacks - Pass-Through or High-Pass)
Subwoofer Outputs Neutrik speakOn® 2-Pole Connectors
(uses Neutrik part: NL2FX)
Calibration Mode Digital Automatic Room Optimization (D.A.R.O.), requires microphone (sold separately)
Equalizer Bands 3
Equalizer Frequency Range 20 to 160 Hz (1 Hz increments)
Equalizer Gain Range -12 dB to +12 dB (0.2 dB increments)
Equalizer Q Range 0.7 to 5.0 (0.1 increments)

 

2 x 6-inch Joist/Stud Enclosure Physical Specifications:
Joist/Stud Cavity Width (W) Minimum: 16 in / 406 mm
Maximum: 25.5 in / 648 mm (on center)
Joist/Stud Cavity Height (H) Minimum: 58 in / 1,473 mm
Width (W) 14 in / 355 mm
Height (H) 40.71 in / 1,034 mm
Depth (D) 5.13 in / 130 mm
Note: Enclosure dimensions do not include L-brackets or vibration-dampening padding.

 

Amplifier Physical Specifications:
Width (W) 16.84 in / 428 mm
Height (H) 1.75 in / 44 mm
Depth (D) 13.63 in / 346 mm
Net Weight 13.5 lb / 6.12 kg
Note: Single Rack Unit - Amplifier Height Dimensions do not include feet.

 

Grille Physical Specifications:
Grille Height (H) 10.50 in / 267 mm
Wallboard Thickness Compatibility 0.5 in to 1.75 in / 13 mm to 44 mm
Grille Width (W) 10.50 in / 267 mm
Wall Opening Height (H) 9.75 in / 248 mm
Wall Opening Width (W) 9.75 in / 248 mm

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