Evolution 222 Features and Technology | Evolution Technologies

SECTION ONE

Evolution 222 Features and Technology

This section describes the innovative features and technology of the Evolution 222 preamplifier, and defines CAST and other key terms used in this reference.

Features

The Evolution 222 has an open loop bandwidth that exceeds 1 MHz and a balanced Krell Current Mode design, terminating in Evolution CAST ™. CAST inputs and outputs drive a newly designed current mode balanced input stage. Class A, balanced circuitry is used throughout the preamplifier. Cascoded, current mirror input and output stages utilize an LED voltage reference to achieve an exceptionally linear state of operation. There are 310 transistors utilized in each channel, and all are Class A biased. A robust power supply is on board for excep- tional audio performance.

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Evolution Technologies manual Evolution 222 Features and Technology

Contents

Evolution Important Safety Instructions Contents List of Illustrations Letter from Dan D’Agostino Evolution 222 Features and Technology Features Revolutionary Krell Cast Technology Voltage Signal Transmission Traditional Audio SystemHow Cast and Krell Current Mode Interact Cast Basics Cast Cable Construction Evolution CastBest Musical Performance Definition of Terms Inputs and OutputsOperation Krell Current Mode TechnologyPage Placement AC Power Guidelines Connecting the Evolution 222 to Your System Quick Start Operating the Evolution Anatomy of the Evolution Selectors Chassis PowerFront Panel Description Remote Functions on the Front Panel Display Navigate/CustomizePreamplifier Functions Level Control Level Control Knob or Level Keys Evolution 222 Remote Control Amplifier Functions Remote Control DescriptionBattery Installation and Removal Balance Functions Compact Disc and DVD Functions Evolution 222 Back Panel Inputs ConfigurationsBack Panel Description Outputs 23 RC-5 Remote Connections on the Back Panel22 RS-232 24 12 VDC In/Out 12 V Trigger Phono Stage Connector Phono Power PortIEC Power Cord Receptacle Connecting the Evolution 222 to Your System XLR Pin ConfigurationInput and Output Connections Connection Steps Evolution 222 Operation On/Off and Stand-by OperationTo Turn Off The System Volume Knob or Level Keys Customizing the EvolutionNavigation Conventions Menu Functions AC Mains Balance channel Balance input trim Display Menu Button or Key Enter or exit the menu Info Input Level Trim Input Name Input Phase Input Trigger Evolution 222 responds to 12 V input trigger commands IR Out Control Link Control can Link Mute Output Trigger RC-5 Control Recall RS-232 Control Save Theater Mode Volume Display Troubleshooting System Noise Warranty Page Return Authorization Procedure To contact the Krell Service Department Specifications Inputs Connair Road