Parasound A 31 manual Parasound Products, Inc McKinnon Ave, San Francisco, CA

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Parasound Products, Inc. 2250 McKinnon Ave, San Francisco, CA 94124

415-397-7100 / Fax 415-397-0144 www.parasound.com

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Contents OWNER’S Guide Important Safety Instructions Table of Contents Parasound Staff Keeping Records for Future Reference Important Warranty informationThank You for Choosing Parasound Unpacking Your a Unpacking Your a 31 & Placement GuidelinesAC Mains Voltage Rack Mounting Your Parasound a Audio Connections Audio Input ConnectionsSpeaker Wire Length and Gauge thickness Speaker ConnectionsSpeaker Terminals Correct Speaker Polarity is ImportantGain Control Settings When to Set the Gain Control Knobs Above or Below NormalTurn On Options Manual PositionAudio Position Automatic on/off 12V Position Automatic on/offAC Power Cord Volt Jacks12V In Jack 12V Loop Out JackFront Panel Operation On-Off ButtonGround Loops Eliminating Hum and Buzz Technically SpeakingBalanced and Unbalanced Lines Bare Speaker Wire Ends Power SupplyParasound a 31 Design Overview Circuit Designed by John CurlComplementary Configuration Relay-Bypassed Soft Start CircuitAudio Circuit Path Topology Input StageOutput Stage Class A-A/B OperationTotal Protection DC Servos Total Protection RelaysProblems and Remedies Unit will not turn onNo sound from speakers Background Hum or HissRepair or Service Are You Having Difficulty?Specifications Parasound Products, Inc McKinnon Ave, San Francisco, CA