Parasound HCA 806A User Manual
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In Case of Trouble
If you suspect a problem with this unit, first recheck all your connections. If only one channel is
inoperative, the trouble may be caused by another component or even a defective hookup cable.
However, if the same channel is at fault when you reverse the Left and Right channel pair cables to your
HCA-806A (turn it off before moving wires), it may indicate trouble within the power amplifier itself.
We suggest you contact your authorized Parasound Dealer or Installer, or call Parasound Technical
Service if you suspect a problem. We may be able to suggest other diagnostic tests you can easily
perform yourself and which will save you a lot of trouble.
If it is determined that the HCA-806A should be returned to Parasound for inspection and possible
servicing, you must first call or write to obtain a Return Authorization number. You will also be asked
to repack the unit in its original packing and both of its cardboard cartons for proper protection in transit.
Units that arrive without the correct Return Authorization number, without a suitable shipping carton or
evidence of improper internal packing will be refused. We cannot accept collect shipments. After
repair under warranty, the unit will be returned to you prepaid. If we found no problem with the unit, we
will return the unit with collect charges for return shipping charges.
Special Features
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Massive 1.2 kVA Power Transformer
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90,000 uF Computer-grade Capacitors in the Power Supply
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Multiple Polystyrene Film Bypass Capacitors in the Power Supply
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Cascode Class A Input Stages with Matched J-FET Pairs
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Hand Picked Complementary Transistors in High Voltage Driver Stages
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24 50 MHz, 15 Ampere Output Transistors, Beta-Matched Complementary Pairs
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Can be powered with external DC source
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Output Transistors Direct-Coupled to Speakers Without LRC Networks
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Linear Tracking, Instantaneous Acting DC Servos
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High-Bias Class A/AB Operation
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Gold-Plated Metal Structure RCA Input Jacks
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Multiple Temperature Sensors and Silver-Cadmium Relay Protection
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FR-4 Glass Epoxy Circuit Boards, Double-Sided for Precision
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Proprietary Quick-Settling Bias Circuits Obviates Warm-Up Period
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Custom Designed Audiophile-Grade AC Power Cord
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Configurable for Multi-Channel Home Theater, Multi-Zone Stereo, Biamp or Triamp Operation