JL Audio f212 Demo Button, Defeat Button, Calibrate Button, Input Mode Indicators, Level Mode

Page 15

Demo Button

The Demo button triggers a 20 second long tone sequence that briefly demonstrates the signals used during A.R.O. calibration. The Demo function is useful for showcasing the output capability of the Fathom and to verify that the Fathom (or multiple Fathoms) are operational during system troubleshooting.

To activate the demonstration sequence, press and hold the “Demo” button for approximately 2 seconds (this built in delay helps prevent accidental activation). Pressing and holding the “Demo” button will activate the demo sequence even if the A.R.O. defeat function is active (see below.) Once the demonstration sequence is complete, the Fathom will return to its previously set operating condition.

Defeat Button

The “Defeat” button turns off or “defeats” the A.R.O. calibration system and equalizer. Use this feature when you want to be sure that the A.R.O.’s equalization is not in the signal chain. You can also use the “Defeat” button to audition both the normal and the A.R.O. optimized settings in your home theater room. This is a great way to audibly verify what effect the A.R.O. has in your room.

If “Demo” or “Calibrate” is pressed while the defeat function is active, “Defeat” is automatically canceled. No other front panel controls will alter the A.R.O. Defeat state.

Calibrate Button

The Calibrate button activates the ARO test sequence. The calibration routine will not start unless the supplied JL Audio test microphone is plugged into the Fathom subwoofer. Once the calibration routine is complete, the green light in the center of the “Calibrate” button will light and remain illuminated. These settings are stored by the Fathom and will remain in memory even if power is disconnected.

During the ARO test sequence the Calibrate button’s green LED will alert the user to two special conditions:

1.“Subwoofer level too low for A.R.O. calibration” via slow blinking, approximately one blink per second

2.“Subwoofer level too high for A.R.O. calibration”, approximately three blinks per second.

Input Mode Indicators

The Input Mode indicator LEDs show the input mode, either “Master” or “Slave”, selected by the switch on the Fathom’s back panel (unless the “Lights” switch is set to “off ”). For further details, see page 20.

Level Mode

The two-position Level Mode switch allows you to select between the following modes:

“Reference”

In this mode, the Master Level control knob has no effect on the Fathom’s output level. Use this setting if you will primarily be controlling the subwoofer level via your receiver or preamplifier/processor. For those of us with small children or overenthusiastic teenagers, this mode of operation will prevent direct manipulation of the Master Level.

“Variable”

In this mode, the Master Level control knob determines the output level of the Fathom subwoofer. This mode is also useful when level matching the Fathom subwoofer to a pair of stereo speakers in a two-channel system. Variable level operation is needed for proper A.R.O. calibration.

Fathom f212

Page 15

Image 15
Contents F212 Risk of Electric Shock Do not Open Important Safety InstructionsFathom f212 Table of Contents FCC Compliance StatementIntroduction Product Overview Placing Your Fathom in Your Listening Room #&454&5*/104*5*0/4 Recommended Subwoofer Placement Options for One FathomSpecial Considerations for BUILT-IN Installations Recommended Subwoofer Placement Options for Two Fathoms Using Two FathomsFathom f212 Detailed instructions on unpacking the subwoofer Unpacking Your FathomFront Control Panel Rear Controls and Connectors Calibration Mic. Input Power SwitchFront Panel Controls in Detail Automatic Room Optimization A.R.ODefeat Button Input Mode IndicatorsLevel Mode Demo ButtonLP Freq Master Level KnobLights LP FilterPhase F. TrimPolarity Connecting Your Fathom Balanced InputsTechnical Notes RCA-type connection Tip Positive Unbalanced InputsInput Mode Switches Grounded / Isolated SwitchMaster / Slave Switch Output to Slave Connector Output to Slave connector is designed to be used as followsIEC-Style AC Connector Fathom Rear Controls Master Processor Stereo Active Crossover Balanced Outputs Fathom f212 On your Active Crossover or Bass Management Processor Recommended Setup ProceduresPreparation for Setup Process On your Home Theater Receiver or Preamp/ProcessorOn the Fathom’s Front Panel Subwoofer System Setup Level SettingPolarity and Phase Adjustment Applying Automatic Room Optimization A.R.O Extreme Low Frequency e.l.f. Trim Frequently Asked Questions Can I place objects on my subwoofer?Is the Fathom magnetically shielded? Gloss-black models Cleaning Your FathomTroubleshooting Fathom f212 International Warranties Limited Warranty / Service InformationIf you need service on your JL Audio product For Service Information in the U.S.A. please callFeatures

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.