Alesis RA500 User Manual - Page 3

Introduction 2 How to Use This Manual 2 IMPORTANT SAFETY INSTRUCTIONS.... 3 Instructions de Sécurité Importantes (French) ...... 4 Beim Benutzen dieses Produktes beachten Sie bitte die folgenden Sicherheitshinweise: (German 5 CE Declaration of Conformity 6 ABOUT THE RA150/300/500 7 Principal Features 7 The Chassis 7 Inputs and Outputs 7 Amplifier topology 7 Protection Circuitry 7 About this manual 8 CONNECTIONS 9 Unpacking and Inspection 9 Power Considerations 9 The AC Cord and Grounding 9 120 Volt/230 Volt Operation 10 Fuse 10 Electrical Service to the RA150/300/500... 10 Operating Environment 11 Temperature Considerations in Rack Mounting 11 Other Rack Mounting Tips 11 Mounting on a Shelf or in a Non-Rack Enclosure 12 Avoiding Electromagnetic Interference .... 12 Inputs 13 Input Jack Characteristics 13 Cables 15 Cable Wiring Tips 15 Balanced or Unbalanced 16 Outputs 18 What's the Load Impedance 18 CONTENTS Connectors 18 Speaker Cables 18 Connecting Speaker Cables to Binding Posts 19 The Importance of Speaker Polarity ..........20 Output Connections for Bridged Operation 20 OPERATION 21 Front Panel Controls 21 Volume Controls 21 On-Off Switch 21 Mute Switch 21 Protect/Clip Indicators 22 Meters (RA300 and RA500 only 22 Back Panel Controls 22 AC Voltage Switch 22 Stereo/Bridged Mono Switch 22 Checking For Proper Polarity 22 Using the RA150 as a Headphone Amplifier.......23 Choosing the Correct Speakers 23 About Ground Loops 24 System Setup and Testing 25 Setting the Gain Properly 25 Output Relays/Thermal Cycling 26 TROUBLESHOOTING 27 Troubleshooting Index 27 Care and Maintenance 28 Cleaning 28 Refer All Servicing to Alesis 28 Obtaining Repair Service 29 Customers outside the USA and Canada 29 SPECIFICATIONS 30 INDEX 34 ALESIS LIMITED WARRANTY 35 RA150/300/500 Reference Manual 1