User Guide

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Table of Contents
Important Safety Instructions ........................................................................................ 3
HCA-1201A Front and Rear Panel Drawings ................................................................. 4
Introduction ..................................................................................................................... 5
Installing and Rack Mounting Your Amplifier................................................................ 5
Ventilation Requirements for Your Amplifier................................................................. 5
Making Connections to Your Amplifier .......................................................................... 6
Speaker Connections...................................................................................................... 6
AC Power Connections and AC Grounding .................................................................. 7
DC Trigger Connection.................................................................................................... 7
Operating Your HCA-1201A ............................................................................................ 7
Maintaining Your Parasound Amplifier .......................................................................... 8
In Case of Trouble............................................................................................................ 8
Parasound HCA-1201A Specifications .......................................................................... 9
Special Features for the Parasound HCA-1201A
THX Ultra certified by Lucasfilm Ltd.
1.5 kVA power transformer, 20,000 uF filter capacitance
Massive toroid power transformer
Multiple polystyrene film bypass capacitors in power supply
Can be powered with external DC source
Cascode Class A input stages with matched J-FET pairs
Hand-picked complementary transistors in high voltage driver stage
12 ampere 50 MHz output transistors
Output transistors direct-coupled to speakers without LRC networks
DC servo direct-coupled audio circuits with 0.8 Hz rolloff
High-bias Class A/AB operation
Gold-plated RCA input jacks
Multiple protection circuits, temperature sensors and silver-cadmium relay protection
Glass epoxy circuit boards, double-sided for precision
Custom designed audiophile-grade AC power cord
The Parasound HCA-1201A is manufactured under license from Lucasfilm Ltd.
Lucasfilm and THX are trademarks of Lucasfilm Ltd.