Standby/Normal Operation LEDs

The red Standby LED will light when the amplifier is turned on either with the power switch or an external DC trigger. It will stay lit about four to five seconds while the amplifier circuits stabilize. After that, the red LED will turn off and the green normal LED will signal that the protection relays have switched off and that amplifier is ready to operate.

The Standby LED will also light whenever there is a short circuit or other fault that triggers the protection circuitry. This may indicate that excess DC is present at the amplifier's input, a speaker impedance overload, a short circuited speaker line, or possible internal fault. If this LED remains lit, remove power to the amplifier and check all connections. During this time, the protection circuits should automatically reset. If the red LED stays lit after you reapply power, contact your Parasound Dealer, Installer or Parasound Technical Service for further advice.

Current Overload LEDs

The Current Overload LEDs for left and right channels will only illuminate if the unit is driven past its maximum current capacity. These LEDs are not clipping indicators, but rather are designed to signal you when you are exceeding the limits of your amplifier. If these LEDs light, it’s usually a sign that your speaker impedance is too low, resulting in too much current draw from the amplifier's power supply. In virtually all imaginable listening situations with recommended loads, these LEDs should never illuminate.

Level Controls

Each channel has its own rear mounted "set and forget" input level control. Your amplifier sounds best with these level controls set to maximum, where they are effectively out of the audio signal path. However, if your preamplifier has very high gain, and its volume control cannot track properly for left- right channel balance near its minimum position, it may be necessary to reduce the input level control settings on the amplifier. When using the HCA-1500A in a THX installation, each level control must be set at maximum, which corresponds to 0 dB THX reference level.

Maintaining Your Parasound Amplifier

The HCA-1500A 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 with water or Windex.

Main Power Fuse

Your amplifier has an external fuse located within the AC receptacle that may blow as a result of an internal fault condition. This protects the unit from possible damage to internal parts. Never replace this fuse with a larger value than installed from the factory. Substitution of a larger fuse may create serious stress or damage to internal parts and will void your warranty.

In Case of Trouble

If you suspect a problem with your amplifier, first turn the amp off and check all your connections. The trouble may be caused by another component or a defective hookup cable. If you are hearing hum out of your speakers, turn off the amplifier and disconnect the inputs to it. If the hum goes away, it is probably be caused by your processor or one of the source components connected to it.

-7-

Page 6 Page 8
Page 7
Image 7
Parasound HCA-1500A Standby/Normal Operation LEDs, Current Overload LEDs, Level Controls, Main Power Fuse, Case of Trouble
Page 6 Page 8

HCA-1500A specifications

The Parasound HCA-1500A is a highly regarded power amplifier that has earned a reputation for delivering exceptional audio performance at an affordable price. This robust amplifier is particularly popular among audiophiles and home theater enthusiasts for its excellent build quality, advanced technology, and impressive sound reproduction capabilities.

One of the standout features of the HCA-1500A is its power output. It delivers 150 watts per channel into 8 ohms and up to 225 watts per channel into 4 ohms, ensuring that it can drive a wide range of speakers with ease. This level of power makes it suitable for both stereo and multi-channel setups, allowing for a versatile listening experience. The amplifier's high current capability is particularly noteworthy, providing the necessary muscle to handle transient peaks and dynamic musical passages without distortion.

The HCA-1500A employs a fully discrete output stage, which helps minimize signal distortion and enhances sonic clarity. This architecture is complemented by high-quality components, including a toroidal transformer and large filter capacitors, which contribute to its impressive performance. The use of a toroidal transformer not only helps to keep the amplifier compact but also reduces electromagnetic interference, leading to cleaner sound reproduction.

In addition to its impressive technical specifications, the HCA-1500A features a user-friendly design. The rear panel includes a variety of input options, including RCA and XLR connections, allowing for flexibility in connecting different audio sources. Its robust construction, with a heavy-duty chassis and professional-grade binding posts, ensures durability and reliability over time.

Another key characteristic of the HCA-1500A is its thermal management system. The amplifier is designed with ample ventilation and heat sinks to dissipate heat efficiently, allowing for sustained performance even during extended listening sessions. This attention to thermal design ensures that the amplifier remains cool and operates within its optimal performance range.

Overall, the Parasound HCA-1500A stands out as a powerful, reliable, and sonically rich amplifier. Its combination of high power output, discrete circuitry, and thoughtful engineering make it a compelling choice for anyone seeking to enhance their audio system's performance. Whether used in a dedicated home theater or a high-fidelity music setup, the HCA-1500A is sure to impress with its ability to deliver a dynamic and immersive listening experience.
Top Page Image Contents