Krell Industries EVOLUTION TWO MONAURAL PREAMPLIFIER Front Panel Description, Chassis, Power

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Front Panel Description

See Figure 1 on page 15

Each Evolution Two Monaural Preamplifier channel is comprised of two chas- sis, the preamplifier chassis and the power supply chassis. Front panel func- tions and their descriptions follow.

Chassis

1Preamplifier Chassis

The preamplifier chassis front panel provides power on, input and zone selec- tion, level control, menu functions, and status display.

2Power Supply Chassis

Powerful transformers, high quality regulators, and extensive electrical and magnetic shielding are housed in a separate power supply for each preampli- fier channel.

Power

3Power Button or Key

Use this button or key to switch the Evolution Two between the stand-by and operational modes.

4Stand-by LED

The red stand-by LEDs on the preamplifier and the power supply illuminate when the Evolution Two is plugged into a standard AC wall receptacle, indicat- ing that the Evolution Two is ready to be switched to the operational mode. The stand-by LEDs flash when remote control signals are received.

5Power Backlight

The blue power backlight illuminates when the Evolution Two is in the opera- tional mode.

Remote Functions on the Front Panel

6Infrared Sensor

The infrared sensor receives commands from the Evolution Two remote con- trol. For proper remote control operation, make sure the infrared sensor is not covered or obstructed.

7Infrared Transmitter LED

The stand-by LED (4) on the preamplifier chassis (1) flashes when the Evolution Two sends signals via the infrared transmitter LED to a programmable remote control, such as the Universal Krell Touch Screen Remote. See IR Out Control, on page 40.

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Contents Evolution Page Contents List of Illustrations Letter from Dan D’Agostino Letter from Dan D’Agostino Krell Legacy About KrellHow Cast and Krell Current Mode Interact Voltage Signal Transmission Traditional Audio SystemRevolutionary Krell Cast Technology Cast BasicsCast Cable Construction Evolution CastBest Musical Performance Zero Feedback Balanced Current Mode Design Ensuring Maximum PerformanceCore Technologies Separate Power Supply Fully Balanced Discrete Volume ControlAdvanced Microprocessor Control Custom Software Configurations Definition of TermsInputs and Outputs Preamplifier Krell Current ModeOperation TechnologyOpening the Evolution Two Shipping Carton Unpacking and PlacementLeft/Right Channel Orientation To Remove the Preamplifier Channel from the Shipping CartonPlacement AC Power GuidelinesRepeat Steps 1-5 for the remaining preamplifier channels Quick Start Connecting the Evolution Two to Your SystemOperating the Evolution Two Linked Mode 11 12 13 Anatomy of an Evolution TwoEvolution Two Remote Control Front Panel Description PowerChassis Remote Functions on the Front PanelDisplay Preamplifier FunctionsNavigate/Customize Level ControlMenu Button or Key Enter Button or KeyBattery Installation and Removal Remote Control DescriptionAmplifier Functions Compact Disc FunctionsIEC Power Cord Receptacle Inputs Back Panel DescriptionOutputs 35, 36 Main Bus Outputs37, 38 Record Bus Outputs Remote Connections on the Back Panel42 RC-5 43 RS-232Link Control Phono Stage ConnectorXLR Pin Configuration Connecting the Evolution Two to Your SystemInput and Output Connections Connection StepsNever connect two power supplies together To Connect Multiple Evolution Two Preamplifiers via can Link Connections Using can LinkEvolution Two Operation On/Off and Stand-by Operation Linked ModeTo Turn Off Your System Play and RecordOperation Using can Link Navigation Conventions Customizing the Evolution TwoAC Mains Menu FunctionsBacklight Enter the menu, thenBalance Channel AssignUse to make a left channel respond as a right channel Use to make a right channel respond as a left channel CloneDisplay Info Front panel display is always onFront panel display times out after 5 seconds Input Level Trim Input NameTo select input names for other inputs, repeat Steps 3 Phase of the selected input is unaffected Input PhasePhase of the selected input is inverted 180 degrees Input TriggerIR Out Control Evolution Two responds to 12 V input trigger commandsLink Control can Link Mute Output TriggerOutput of the Evolution Two is completely silenced RC-5 Control Recalls the factory settings RecallRS-232 Control Software Clone SaveTape Input Begins the software clone processInitiates the software clone Theater Mode +12 dB. The options are Enter the menu, then Volume DisplayQuestions and Answers Troubleshooting System Noise Connection of multiple preamplifier channels Appendix can Link and Multiple Evolution Two PreamplifiersAppendix can Link and Multiple Evolution Two Preamplifiers Warranty Warranty To contact the Krell Service Department Return Authorization ProcedureService@krellonline.com AM to 500 PM ESTControl outputs Specifications

EVOLUTION TWO MONAURAL PREAMPLIFIER specifications

Krell Industries has long been a name synonymous with high-fidelity audio equipment, and their EVOLUTION TWO MONAURAL PREAMPLIFIER is a testament to this legacy. This premium preamp is designed to cater to audiophiles, delivering unparalleled sound quality and meticulous attention to detail.

At the heart of the EVOLUTION TWO lies Krell's commitment to superior audio performance. The preamplifier employs a fully balanced, differential signal path that minimizes noise and distortion, ensuring that the audio output is pure and true to the source. This architecture not only enhances sound quality but also integrates seamlessly with other high-end audio components in any setup.

One of the standout features of the EVOLUTION TWO is its advanced power supply design. Krell employs a toroidal transformer coupled with high-energy storage capacitors to provide stable, clean power. This allows for improved dynamics and transient response, helping to reproduce the complex nuances of music in a way that engages the listener. The preamplifier's power supply is designed to operate with extreme efficiency, ensuring consistent performance even during the most demanding listening sessions.

Additionally, the EVOLUTION TWO comes equipped with Krell's proprietary CAST (Current Audio Signal Transmission) technology. This innovative feature allows for a direct, impedance-matched connection between components, significantly reducing signal degradation over long cable runs. Audiophiles will appreciate the clarity and fidelity produced by CAST, revealing subtle textures and details in their favorite recordings.

The preamplifier also includes a range of inputs and outputs, catering to various audio sources and systems. Users can connect multiple devices, including digital sources, with ease, thanks to the EVOLUTION TWO's advanced input switching capabilities. The unit supports balanced XLR connections as well as unbalanced RCA outputs, providing flexibility for users with different equipment configurations.

Moreover, the EVOLUTION TWO MONAURAL PREAMPLIFIER boasts a stunning aesthetic, showcasing Krell's hallmark design philosophy. With its sleek chassis and elegant finish, the preamp not only sounds good but looks great in any audio setup.

In summary, the Krell Industries EVOLUTION TWO MONAURAL PREAMPLIFIER is a high-performance audio component that encapsulates cutting-edge technology and exceptional craftsmanship. With its balanced signal path, innovative power supply design, CAST technology, and versatile connectivity options, it is a remarkable addition to any serious audiophile's system, promising a listening experience that truly transcends the ordinary.
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