Clarion APX400 manual High-pass/Low-pass Filter Controls

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RIGHT, FRONT LEFT, REAR RIGHT and REAR LEFT. The Gain Controls provide a wide adjustment range to accommodate output levels from any brand of source unit.

•Gain Controls - Seperate Front and Rear Gain Controls allow you to set the nominal operating level of the amplifier. The amplifier’s range, 250mV to 2.5V for RCA inputs or 500mV to 5V for speaker level inputs, can accommodate input levels from virtually any brand of source unit.

•Bass Boost Control - The amplifier also features a “high-Q” (i.e. narrow frequency band) Bass Boost circuit. It acts much like an equalizer, with adjustable gain (from 0 to +18dB) fixed at 45Hz. Use this feature to tune low- frequency audio response to compensate for a less than ideal subwoofer enclosure design. The added boost produces rich, full bass tones that are normally difficult to reproduce in the car audio environment. Note: If Bass Boost is undesired, set Bass Boost to 0dB.

High-pass/Low-pass Filter Controls

•Freq (Hz) Controls - The front crossover frequency is fully adjustable between 55Hz and 550Hz. The rear crossover frequency is fully adjustable between 55Hz and 5500Hz (via the Rear Crossover Frequency Multiplier) for a wide range of crossover points. Use this feature, along with your speaker manufacturer’s recommended crossover frequencies, to quickly design a more advanced system (see Applications on page 6.) NOTE: If either of the X-Over Mode Switches is set to OFF, varying the Freq (Hz) Control will produce no effect.

•Rear X-Over Frequency Multiplier Switch - When engaged, this switch increases the crossover frequency of the rear channels by a factor of 10. Example: If the Freq (Hz) dial is set for 240Hz, pushing in the multiplier Switch changes the setting to 2400Hz.

•X-Over Mode Switches - These switches are equipped with 12dB per octave electronic filters for precise frequency attenuation with minimal phase distortion. The steep crossover slopes keep midrange tones out of the subwoofer and thereby eliminating an unnatural “nasal” tone quality in the audio system. Each filter is activated by sliding the X-Over Mode Switch to either LP or HP.

•Input Mode Switches - These switches allow you to set the input mode for front and rear channels. Stereo input allows full left and right stereo operation. Right (bridged) input allows single channel input for bridged operation. This is especially useful in high-powered systems when using the APX400.4M as a bridged 2 channel amplifier. L + R (sum mono) allows a stereo input to be summed into a mono output.

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Contents Page Table of Contents About the Manual and WarrantyIntroduction Description Input Connections and Audio ControlHigh-pass/Low-pass Filter Controls Connections for Power and Speakers Applications Page Channel Stereo System with Low-Pass Bridged Mono Channel Channel High Power Systems Satellite or Subwoofer Mixed-Mode System On Rear Full-Range Speakers On Front Mounting Precautions InstallationWiring Precautions Electrical connections for the APX400.4M Setting the Crossover Setting the GainSetting the Bass Boost Troubleshooting Final System ChecksProduct Specs APX400.4MAPX400.4M-10 Rev.2 05/00

APX400 specifications

The Clarion APX400 is a state-of-the-art car audio amplifier that combines innovative technologies with a sleek design to deliver exceptional sound quality for automotive audio systems. As an amplifier known for its powerful performance and versatility, the APX400 has become a popular choice among car audio enthusiasts looking to enhance their listening experience.

One of the standout features of the APX400 is its high power output. With a maximum output of 400 watts, it supports a wide range of speaker configurations, making it suitable for both component and coaxial speakers. The amplifier's robust power handling capability ensures that it can deliver clean, distortion-free sound at high volumes, allowing users to enjoy their favorite music without compromising on quality.

The Clarion APX400 utilizes advanced Class D amplifier technology, which enables efficient power consumption while maintaining high audio fidelity. This technology is designed to minimize heat generation, ensuring that the amplifier operates efficiently and reliably even during prolonged use. Additionally, the Class D design contributes to a compact form factor, making installation in various vehicle configurations easier without taking up excessive space.

The APX400 features comprehensive signal processing capabilities, including adjustable high-pass and low-pass filters. This allows users to tailor the audio output to their specific listening preferences and adapt it to the acoustic characteristics of their vehicle. The amplifier also includes a variable gain control, making it simple to match the output level with other components in an audio system for seamless integration.

Another significant aspect of the Clarion APX400 is its robust build quality. The amplifier is constructed with durable materials that can withstand the rigors of automotive environments, ensuring long-lasting performance. Its streamlined design supports effective heat dissipation, which is critical for maintaining operational stability, especially during high-demand situations.

Additionally, the APX400 is equipped with multiple protection circuits to guard against short circuits, overheating, and over-voltage situations. This ensures both the safety of the amplifier and the connected audio components, providing peace of mind for users.

In summary, the Clarion APX400 offers a compelling combination of power, versatility, and durability. With its advanced Class D technology, adjustable filters, and protective features, it stands out as a premium choice for anyone looking to elevate their car audio experience to the next level.
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