Operating the HCA-3500, Power Switches

Operating the HCA-3500

Refer to Figure #1

Power Switches

There are separate power switches for the left and right channels. Press the upper side to turn each channel on; press the lower side to turn each channel off.

Bi-Color Channel Status Indicators

When you first turn the power switches of the HCA-3500 on, the Left and Right channel status indicators will light red for about five seconds while the internal circuits are stabilizing. After that, these indicators will change from red to green to signal that bothe channels are operational. Either the Left or Right channel status indicator may change from green to red if there is a fault that triggers the protection circuitry. This may indicate one of the following conditions: DC present at the amplifier's input, a speaker impedance overload, a short circuited speaker line, or a possible internal fault. If either indicator changes to red, remove power to the amplifier and check all connections. During this time, the protection circuits should automatically reset. If either Left or Right channel status indicators remain red after you reapply power, contact your Parasound Dealer, Installer, or Parasound Technical Service Department for further advice.

Current Overload Indicator

These indicators let you know if there is too low of an impedance at the amplifier's output thereby exceeding the amplifiers current capacity. During normal operation, the bi-color Left and Right channels indicators for the will be green and the Current Overload indicator will remain off. If either channel is driven beyond its maximum current capacity because the impedance for that channel is too low, the Current Overload indicator will light red and the affected channel's indicator will change from green to red.

High Temp Indicator

This indicator will light when either of the external heatsinks reaches 90 degrees centigrade. If the High Temp indicator lights, it probably means that the amplifier has inadequate ventilation. If either channel is driven beyond its thermal capacity, the High Temp indicator will light red and the affected channel's indicator will change from green to red. Refer to page 6 for more information about proper ventilation. Once the heatsink cools below 90 degrees, the amplifier channel will automatically reset and resume normal operation.

Maintaining Your Parasound Amplifier

Your Parasound power amplifier requires no periodic maintenance and has no user serviceable parts inside. To avoid the risk of electric shock, do not remove the top cover. The amplifier's exterior can easily be cleaned with a soft cloth moistened only with a few drops of water or glass cleaner.

Main Power Fuses

There is an external fuse for each channel on the rear panel. These fuses protect the unit from possible damage to internal parts. Never replace fuses with a higher value than installed from the factory. Substitution of larger fuses may create serious stress and damage to internal parts and will void your warranty.

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HCA-3500 specifications

The Parasound HCA-3500 is a high-performance power amplifier renowned for its robust design and exceptional audio quality. This model is part of Parasound's Classic series, aimed at audiophiles seeking both power and fidelity in their audio systems. With a solid build and advanced technologies, the HCA-3500 continues to garner attention for its performance capabilities.

One of the main features of the HCA-3500 is its powerful output, delivering 350 watts per channel into 8 ohms, and an impressive 700 watts per channel into 4 ohms. This ensures that the amplifier can drive a wide range of speakers with ease, particularly those requiring higher power levels to achieve optimal performance. The high current abilities of the HCA-3500 provide agility in dynamic musical passages, making it a favorite among professionals and enthusiasts alike.

The HCA-3500 employs a fully discrete, Class A/AB output stage. This design minimizes crossover distortion, allowing for a clean, transparent sound signature that captures the nuances of the original recording. The amplifier features a tight feedback loop that enhances stability while maintaining an excellent signal-to-noise ratio, contributing to its pristine audio reproduction.

One of the standout technologies in the HCA-3500 is its use of the proprietary Halo technology, which incorporates advanced circuit design and high-quality components. This includes gold-plated connectors and high-grade capacitors that enhance signal integrity and longevity. Moreover, the parasitic capacitance in the circuitry is minimized to further improve signal clarity.

In terms of build quality, the HCA-3500 is impressively robust, housed in a sturdy chassis that reduces vibration and interference. The amplifier’s layout is designed for efficient heat dissipation, featuring large heatsinks that help maintain optimal operating temperatures even under demanding conditions.

User-friendly features are also a highlight, such as the ability to bridge the amplifier for mono operation, enhancing its versatility in various setups. Additionally, the HCA-3500 includes a 12V trigger input, allowing for seamless integration with home theater systems and automation setups.

In summary, the Parasound HCA-3500 is an exemplary power amplifier that combines power, fidelity, and advanced technology in one package. Its capabilities make it suitable for both high-end audio systems and professional applications, ensuring that listeners enjoy a deeply immersive audio experience. With its commitment to audio excellence, the HCA-3500 continues to be a respected option for those who seek quality in amplifier performance.