Parasound A 31 manual OWNER’S Guide

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A 31

Three Channel Amplifier

OWNER’S GUIDE

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Contents OWNER’S Guide Important Safety Instructions Table of Contents Thank You for Choosing Parasound Important Warranty informationParasound Staff Keeping Records for Future Reference AC Mains Voltage Unpacking Your a 31 & Placement GuidelinesUnpacking Your a Rack Mounting Your Parasound a Audio Input Connections Audio ConnectionsSpeaker Connections Speaker Wire Length and Gauge thicknessSpeaker Terminals Correct Speaker Polarity is ImportantWhen to Set the Gain Control Knobs Above or Below Normal Gain Control SettingsManual Position Turn On OptionsAudio Position Automatic on/off 12V Position Automatic on/offVolt Jacks AC Power Cord12V In Jack 12V Loop Out JackOn-Off Button Front Panel OperationBalanced and Unbalanced Lines Technically SpeakingGround Loops Eliminating Hum and Buzz Power Supply Bare Speaker Wire EndsParasound a 31 Design Overview Circuit Designed by John CurlRelay-Bypassed Soft Start Circuit Complementary ConfigurationAudio Circuit Path Topology Input StageClass A-A/B Operation Output StageTotal Protection DC Servos Total Protection RelaysUnit will not turn on Problems and RemediesNo sound from speakers Background Hum or HissAre You Having Difficulty? Repair or ServiceSpecifications Parasound Products, Inc McKinnon Ave, San Francisco, CA