Clarion APX400.2M manual Final System Checks, Troubleshooting

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FINAL SYSTEM CHECKS

1.Start the engine and turn on the source unit. After a two-second delay, slowly increase the Volume Control and listen to the audio. If you hear any noise, static, distortion or no sound at all, check the connections, and also refer to Troubleshooting. Depending on your system design, the levels may become quite loud even at low Volume Control settings. Until you get an “audio feel” of the system’s power, use care when adjusting controls.

2.Turn the Balance Controls to their extreme positions and listen to the results. Audio imaging should match control settings (audio from the left speaker when balance is left).

3.Increase the volume and verify that the amplifier reproduces audio (at full frequencies) without distortion. If you hear distortion, check the connections and verify that the Gain Control is set correctly. Another possibility is damaged speakers or under-powered speakers. Once again refer to Troubleshooting for additional help.

TROUBLESHOOTING

Problem

No Audio.

Solution

Low or no remote turn-on voltage. Check remote connections at amplifier and source unit.

Blown amplifier fuse. Replace with new fast-blow fuse (same rating).

Power wires not connected. Check battery and ground wiring at amplifier; also check battery connections.

Speaker leads shorted. Check speaker continuity to ground, it should not show a common ground.

Speakers not connected or are blown. Check speaker connections at amplifier, measure coil impedance.

Problem

Audio cycles on and off.

Solution

Thermal protection circuits are shutting amplifier off. Check location for adequate ventilation; consult an authorized Clarion Audio Dealer.

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Contents Page Table of Contents About the Manual and WarrantyIntroduction Input Connections and Audio Controls DescriptionHigh-pass/Low-pass Filter Controls Connections for Power and Speakers Applications Channel Full-Range, Satellite, or Subwoofer Stereo System Mixed-Mode Satellite and Subwoofer System Mounting Precautions InstallationWiring Precautions Page Electrical connections for the APX400.2M Setting the Crossover Setting the GainSetting the Bass Boost Final System Checks TroubleshootingAPX400.2M Product SpecsPage APX400.2M-10 Rev.2 05/00

APX400.2M specifications

The Clarion APX400.2M is a powerful and versatile 2-channel amplifier designed to deliver high-quality audio performance for car enthusiasts and audiophiles alike. Known for its durability and efficiency, this amplifier is built to enhance the listening experience in any vehicle.

One of the key features of the APX400.2M is its impressive power output. With a maximum power rating of 400 watts, this amplifier can drive a variety of speakers, providing clear and powerful sound reproduction at any volume level. Its RMS output of 100 watts per channel at 4 ohms ensures that users receive a consistent and reliable audio experience.

Another significant characteristic of the APX400.2M is its Class D amplifier technology. This design not only contributes to the lightweight and compact form factor of the unit but also ensures greater energy efficiency compared to traditional Class A/B amplifiers. As a result, minimal heat is generated, allowing for extended listening sessions without the worry of overheating.

The APX400.2M features an adjustable high-pass filter, which allows users to tailor the sound to their specific preferences and needs. This filter helps to eliminate unwanted low frequencies, ensuring that the audio output remains clean and distortion-free, particularly when paired with subwoofers. Additionally, the amplifier includes a bass boost function, which can be activated to enrich the low-end response, making it ideal for genres such as hip-hop and electronic music.

Installation convenience is another noteworthy aspect of the Clarion APX400.2M. The amplifier is designed with a compact footprint, enabling it to fit in various locations within the vehicle without consuming excessive space. Consequently, it is an excellent choice for those with smaller vehicles or limited installation options. Moreover, the amplifier features a robust construction, ensuring it withstands the rigors of the automotive environment, including vibrations and temperature fluctuations.

In summary, the Clarion APX400.2M stands out with its powerful performance, energy-efficient Class D technology, adjustable high-pass filter, and durable construction. This amplifier is an excellent choice for anyone looking to elevate their car audio system, delivering impressive sound quality and reliability. Whether for everyday driving or a weekend road trip, the APX400.2M is sure to satisfy even the most discerning audio enthusiasts.
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