Clarion APX201.2, APX401.2 installation manual High-pass/Low-pass Filter Controls

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2 Channel Power System Amplifier

•Gain Control - This allows 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

•Frequency (Hz) Selection Control - The crossover frequency is fully adjustable between 55Hz to 5500Hz (via the Crossover Frequency Multiplier) for a wide range of crossover points. Use this feature, along with your speak- er manufacturer’s recommended crossover frequencies, to quickly design a more advanced system (see Applications on page 5.) NOTE: If the X-Over Mode Switch is set to OFF, varying the Freq (Hz) Control will produce no effect.

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

•X-Over Mode Switch - This switch is equipped with a 12dB per octave electronic filter for precise frequency attenuation with minimal phase distor- tion. The steep crossover slope keeps midrange tones out of the subwoofer and thereby eliminates an unnatural “nasal” tone quality in the audio system. The filter is activated by sliding the X-Over Mode Switch to either LP or HP.

•Input Mode Switch - This switch allows you to set the input mode. 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 one amplifier for each subwoofer/speaker.

L + R (sum mono) allows a stereo input to be summed into a mono output.

•Speaker Level Inputs - These provide connections for a high-level stereo source. These connections are provided for installations when the source unit does not have RCA outputs.

WARNING:When using the speaker (high-level) inputs, the Black wire must be grounded at the radio. Failure to do this will result in noise and/or improp- er operation.

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Contents E R a T IO N Installation N U a L About the Manual and Warranty Table of ContentsIntroduction Description Input Connections and Audio ControlsHigh-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 Channel Power System Amplifier Electrical connections for the APX201.2 or the APX401.2 Setting the Crossover Setting the GainSetting the Bass Boost Troubleshooting Final System ChecksDistorted audio Product Specs APX201.2 APX401.2Warranty Information

APX201.2, APX401.2 specifications

The Clarion APX401.2 and APX201.2 are high-performance amplifiers designed to enhance the audio experience in vehicles, providing powerful sound and impressive clarity. These models boast advanced technologies and features that make them a popular choice among car audio enthusiasts.

One of the standout features of both the APX401.2 and the APX201.2 is their Class D amplifier topology. This technology allows for efficient power consumption, reduced heat generation, and a compact form factor, making these amplifiers ideal for modern vehicles with limited space. The Class D design provides high output power, ensuring that users can enjoy their music at high volumes without distortion.

The APX401.2 is a four-channel amplifier capable of delivering a maximum power output of 400 watts. This model is suitable for powering a full-range speaker system, allowing users to drive multiple speakers while maintaining sound quality. The built-in low-pass filter and high-pass filter options enable customization of sound frequencies, ensuring that the audio output is tailored to the listener's preferences and the speakers' capabilities.

On the other hand, the APX201.2 is a two-channel amplifier that provides up to 200 watts of maximum power. This model is perfect for those who want to power a pair of speakers or a subwoofer with precision and clarity. The APX201.2 also includes adjustable gain control, allowing users to optimize the input signal to achieve the best possible sound.

Both amplifiers feature a reinforced aluminum chassis that enhances durability and protects against vibrations, which are common in a mobile environment. The aesthetic design, characterized by a sleek and modern finish, ensures that these amplifiers can blend seamlessly with most car interiors.

In terms of connectivity, the APX401.2 and APX201.2 come equipped with RCA inputs, allowing for easy integration with aftermarket head units. Moreover, the amplifiers feature a compact design, making installation straightforward and accommodating in various vehicle types.

Finally, these amplifiers are engineered with a range of safety features, including short circuit protection, thermal protection, and overload protection. These safeguards ensure reliable operation, giving users peace of mind while enjoying their audio experience.

In summary, the Clarion APX401.2 and APX201.2 amplifiers offer high-quality sound output, advanced features, and a durable design, making them exceptional choices for anyone looking to elevate their vehicle's audio system. Whether powering multiple speakers or a dedicated subwoofer, these amplifiers deliver performance and reliability, ensuring an enjoyable listening experience on the road.
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