FRONT PANEL CONTROLS IN DETAIL

Power Switch

The “Power” switch determines the operational readiness of the Fathom subwoofer and should be the only switch used to turn the Fathom on and off. Do not use a power strip switch, switched outlet or any other external switch as these may result in undesirable and potentially damaging transient pops. Do not unplug the Fathom’s AC power cord while the unit is turned on.

The power switch has three positions:

“On”: The Fathom is fully powered at all times. Front panel lights are on unless they have been turned off via the “Lights” switch.

“Off ”: The Fathom’s internal power amplifier is powered down. In this state, a negligible current draw will exist for operating the main power relays. All front panel lights are off .

“Auto”: The Fathom will power up its internal amplifier when an audio signal is present at any of its inputs and will power down the internal amplifier if no signal has been detected at its inputs for thirty (30) minutes. When dormant, the Fathom will draw a very small amount of current (< 5 watts) to power its signal-sensing circuitry. Front panel lights will turn off when the Fathom powers down and light when the Fathom powers up (unless they have been turned off via the “Lights” switch).

In the unlikely event that the Auto feature is not sensitive enough for a particular system, use a Y-cable adaptor to split the incoming signal into both RCA or XLR inputs on the Fathom. This will increase the input sensitivity by 6 dB. Please be aware that if the Auto sensitivity is too high or if there is significant noise on the input cable, the Fathom may not turn off as desired. If this happens, remove the Y-cable adaptor or look for the noise source in the upstream components.

Automatic Room Optimization (A.R.O.)

A powerful feature of the JL Audio Fathom subwoofers is their innovative Automatic Room Optimization (A.R.O.) technology. This one-touch system serves to eliminate the single largest acoustic response peak in your home theater at the main listening seat, greatly improving the in-room low-frequency response. Calibration of the A.R.O. system is fully automated and takes only a few minutes to accomplish. Please consult the next section of this manual for details on how to use the A.R.O. system

Using the included JL Audio calibration microphone, the A.R.O. calibration procedure takes less than three minutes. In brief, you will connect the included microphone to the “Calibration Mic.” input, press the Calibrate button, and then hold the microphone at ear height in your main listening seat during the test. A series of tones will be played through the Fathom subwoofer, and the room response will be automatically measured, analyzed and equalized to eliminate the single largest acoustic room response peak at your listening seat. For detailed instructions

on the A.R.O. setup procedure, refer to pages 29-30.

Calibration Mic. Input

This input is for connecting the supplied JL Audio calibration microphone to the Fathom subwoofer. Connect one end of the supplied cable to the microphone and the other end to this jack prior to using the A.R.O. system. The A.R.O. system is specifically calibrated to this microphone and its connection scheme is specific to the supplied microphone. The calibration sequence will not operate when a different microphone is connected or if no microphone is connected.

IMPORTANT

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Fathom f212

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JL Audio f212 Front Panel Controls in Detail, Power Switch, Automatic Room Optimization A.R.O, Calibration Mic. Input
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f212 specifications

The JL Audio F212 is a premier subwoofer designed to deliver exceptional low-frequency performance for audiophiles and music enthusiasts alike. As part of JL Audio’s renowned subwoofer offerings, the F212 stands out due to its advanced engineering and innovative technology, providing an unparalleled audio experience.

At the heart of the F212 is its unique dual 12-inch driver design, which enables it to reproduce deep bass notes with remarkable clarity and power. The drivers are engineered using JL Audio’s proprietary technology, including a high-excursion suspension system that allows for maximum cone movement without distortion. This ensures that the F212 can handle high power levels while maintaining accuracy across the frequency spectrum.

One of the standout features of the F212 is its robust construction. The subwoofer enclosure is built from high-quality MDF (medium-density fiberboard), designed to minimize resonance and prevent unwanted vibrations that could color the sound. The enclosure is also meticulously tuned for optimal performance, allowing the subwoofers to operate efficiently and deliver rich, immersive bass.

The F212 utilizes advanced thermal management technologies, ensuring that the drivers remain cool during prolonged use. This is achieved through strategically placed venting systems that promote airflow and minimize heat buildup. As a result, users can enjoy continuous, powerful bass performance without the concern of overheating.

In addition to its impressive physical characteristics, the F212 is equipped with sophisticated signal processing capabilities. This allows for seamless integration into any audio system, whether for home theater or high-fidelity music reproduction. The subwoofer features adjustable crossover settings, phase control, and volume adjustments, enabling users to tailor the sound to their specific preferences and room acoustics.

Another noteworthy aspect of the F212 is its versatility. It can be used in various applications, from home audio setups to professional sound reinforcement, making it an ideal choice for anyone seeking to enhance their bass performance. With its combination of power, precision, and advanced technology, the JL Audio F212 stands as a testament to the company’s commitment to delivering high-quality audio solutions that exceed expectations.

In essence, the JL Audio F212 is not just a subwoofer; it’s a statement of quality and performance. Its robust build, innovative technology, and impressive sound output make it a top choice for serious music lovers and home theater enthusiasts seeking to elevate their auditory experience. Whether you’re deep into a cinematic experience or enjoying your favorite music, the F212 is sure to deliver the thunderous bass and clarity that will leave a lasting impression.
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