JL Audio f212 owner manual Master Level Knob, Lights, LP Filter, LP Freq

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Master Level Knob

The Master Level Knob is used to control the output level of the Fathom when the Variable Level mode is selected on the front control panel.

When rotated fully counter clockwise, the Fathom’s output will be fully muted. When at the “0” or straight up position, the Variable gain level matches the Reference level setting. When turned fully clockwise, the Fathom’s output level is 15 dB higher than the Reference setting.

Lights

The “Lights” selector switch allows the user to select one of three indicator light modes.

“Off” turns off all of the front panel LED’s at all times.

“Dim” sets all of the front panel LEDs to a low brightness level when the Fathom is turned on.

“On” sets all of the front panel LEDs to full brightness level when the Fathom is turned on.

IMPORTANT: WHEN TROUBLESHOOTING OR CALIBRATING THE A.R.O. FEATURE, MAKE SURE THAT THE “LIGHTS” SWITCH IS SET TO “DIM” or “ON.”

LP Filter

The Low Pass (LP) Filter selector switch determines the operating mode of the Fathom’s built-in low pass filter.

“Off” defeats the low pass filter, completely removing this circuit from the signal path.

“12 dB” sets the roll off slope of the low pass filter to a 12 dB per octave slope (Butterworth alignment).

“24 dB” sets the roll off slope of the low pass filter to a 24 dB per octave slope (Linkwitz-Riley alignment).

The 24 dB setting more aggressively attenuates high frequencies above the LP Frequency setting (see below). If you are using the Fathom’s built-in low pass filter, experiment with the LP Filter slope setting to achieve the best transition to your satellite speakers. If you prefer to use the filters and bass management features in your receiver or preamplifier, defeat the

on-board filter by selecting the “Off ” position.

LP Freq

The Low Pass (LP) Frequency selector knob allows the user to choose the roll- off frequency of the Fathom’s internal low pass filter. The frequency is variable between 30 Hz (full counter-clockwise) to 130 Hz (full clockwise). This knob does not affect the input signal in any way if the LP Filter switch is set to “Off ”.

80 Hz is a commonly used filter frequency and usually serves as a good starting point for adjustments.

IMPORTANT

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Fathom f212

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Contents F212 Important Safety Instructions Risk of Electric Shock Do not OpenFathom f212 FCC Compliance Statement Table of ContentsIntroduction Product Overview Placing Your Fathom in Your Listening Room Recommended Subwoofer Placement Options for One Fathom #&454&5*/104*5*0/4Special Considerations for BUILT-IN Installations Using Two Fathoms Recommended Subwoofer Placement Options for Two FathomsFathom f212 Unpacking Your Fathom Detailed instructions on unpacking the subwooferFront Control Panel Rear Controls and Connectors Power Switch Front Panel Controls in DetailAutomatic Room Optimization A.R.O Calibration Mic. InputInput Mode Indicators Level ModeDemo Button Defeat ButtonMaster Level Knob LightsLP Filter LP FreqF. Trim PhasePolarity Balanced Inputs Connecting Your FathomTechnical Notes Unbalanced Inputs RCA-type connection Tip PositiveGrounded / Isolated Switch Input Mode SwitchesMaster / Slave Switch Output to Slave connector is designed to be used as follows Output to Slave ConnectorIEC-Style AC Connector Fathom Rear Controls Master Processor Stereo Active Crossover Balanced Outputs Fathom f212 Recommended Setup Procedures Preparation for Setup ProcessOn your Home Theater Receiver or Preamp/Processor On your Active Crossover or Bass Management ProcessorOn the Fathom’s Front Panel Level Setting Subwoofer System SetupPolarity and Phase Adjustment Applying Automatic Room Optimization A.R.O Extreme Low Frequency e.l.f. Trim Can I place objects on my subwoofer? Frequently Asked QuestionsIs the Fathom magnetically shielded? Cleaning Your Fathom Gloss-black modelsTroubleshooting Fathom f212 Limited Warranty / Service Information If you need service on your JL Audio productFor Service Information in the U.S.A. please call International WarrantiesFeatures

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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