•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 equlaizer, 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 and 5500Hz (via the 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 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 distortion. The steep crossover slope keeps midrange tones out of the subwoofer and thereby eliminates an unnatural “nasal” tone quality in the audio system. A 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. In addition, these connections are provided for installations where the source unit’s RCA outputs are unavailable.

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 improper operation.

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Clarion APX200.2, APX400.2 manual High-pass/Low-pass Filter Controls
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APX400.2, APX200.2 specifications

The Clarion APX200.2 and APX400.2 are premium amplifier models that cater to audiophiles looking to enhance their audio systems with superior sound quality and performance. These amplifiers are renowned for their innovative technologies, superior build quality, and user-friendly designs, making them an excellent choice for both newcomers and seasoned enthusiasts in car audio.

The APX200.2 model is a compact, two-channel amplifier that delivers a power output of 100 watts RMS per channel at 4 ohms, making it suitable for driving various speakers and subwoofers. It features a high/low pass crossover which allows users to tailor the frequency response according to their preferences, ensuring an optimal listening experience. The APX200.2 also incorporates a bass boost function, which enhances low-frequency performance, ideal for those who enjoy deep and powerful bass.

On the other hand, the APX400.2 is a more powerful option, providing 200 watts RMS per channel at 4 ohms. This amplifier is designed for users who demand higher power and performance, significantly enhancing the sound system’s overall dynamics and clarity. Like the APX200.2, the APX400.2 includes a high/low pass crossover and bass boost function, giving users complete control over their audio tuning.

Both models feature a Class D design, which not only contributes to their lightweight and compact size but also ensures higher efficiency and lower heat generation compared to traditional Class AB amplifiers. This allows for extended playback times without the risk of overheating, making them ideal for intense listening sessions.

The APX series amplifiers are also equipped with advanced thermal protection and short-circuit protection features, enhancing their reliability and longevity. The robust build quality ensures they can withstand the rigors of automotive environments, providing peace of mind for users.

In terms of installation, both models come with a user-friendly design, allowing for straightforward connections with clear labeling and wiring harnesses. The sleek, modern aesthetic is designed to complement any car interior, making these amplifiers not just functional but also visually appealing.

Overall, the Clarion APX200.2 and APX400.2 amplifiers offer exceptional performance, versatility, and durability, making them outstanding choices for anyone looking to elevate their car audio experience. Whether for everyday listening or high-intensity audio sessions, these amplifiers deliver impressive sound quality that is sure to satisfy even the most discerning audiophiles.
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