5.Add an external fuse on the amplifier’s positive (+) power lead and connect it as close as possible to the vessel’s (+) battery terminal. Use a rating that equals the total current consumption at full output of all amplifiers in the system. Adding an external fuse will protect the electrical system from short circuits that can cause a fire.

6.Refer to Figure 6 when making electrical connections. Connect the amplifier’s positive (+) lead via a fuse directly to the positive (+) terminal on the battery. Do not connect this wire to the vessel’s fuse panel. Use red- insulated 10-gauge (or larger) wire for the amplifier’s positive (+) power lead and the same-gauge black-insulated wire for the ground.

7.When replacing the amplifier’s fuse, always use one having the same current rating. Substituting a higher-rated fuse or a slow-blow type can result in serious damage to the amplifier.

8.Make sure that your vessel’s electrical system (alternator, battery, etc.) is capable of handling the additional load. If you are planning a multi-amplifier system, you may need to add a second battery and possibly upgrade the alternator with a higher-output rated model. Consult your authorized Clarion dealer for recommendations.

9.To avoid noise problems, run the amplifier’s positive (+) power lead along one side of the vessel to the battery. Run the remote turn-on wire and RCA audio cables down the center, and route the speaker wires along the remaining side. If wires must cross, run them perpendicular to each other.

10.When creating passage holes for the power wire, use grommets to eliminate any sharp edges created during drilling. This will protect the wire from being nicked and causing a short circuit.

11.Extra cable can cause signal loss and act as an “antenna” for noise. Use only high-quality RCA cables that are no longer than necessary to make a direct connection with the source unit or equalizer.

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Clarion APX400.2M manual

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.