Krell Industries EVOLUTION TWO MONAURAL PREAMPLIFIER manual Info, Front panel display is always on

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PC Boards

CAST IN 1

CAST IN 2

CAST IN 3

CONNECT

CONTROL

DISPLAY DISPLAY VERSION ENCODER FACEPLATE MAIN

OUT 1

OUT 2

REGULATOR

TAPE OUT 1

TAPE OUT 2

VOLT IN

VOLUME

ON

The front panel display is always on.

TIMED

The front panel display times out after 5 seconds.

BRIGHTNESS

Controls the brightness of the display. When the brightness setting is OFF, the display is at 50% of brightness when in menu mode, and turns completely off when you leave the menu mode.

Info

This function enables you to access information about the preamplifier software, EEPROM, and PC Boards. The PC Boards are listed in the left margin, on this page.

Enter the menu, then:

1.Use the level control knob on the preamplifier chassis front panel or up and down keys (16) on the remote control to select: INFO.

2.Press the enter button on the preamplifier chassis front panel or the enter key (18) on the remote control. The front panel display (15) show the software ver- sion number.

3.Rotate the level control knob clockwise or press the up key. The front panel display shows the EEPROM version number.

4.Rotate the level control knob clockwise or press the up key again. The front panel display shows the PC board version number.

5.Press the enter button or key. Use the level control knob or the up and down keys to scroll through the version numbers of PC boards, from the PC Boards listed at left.

EEPROM

Electrically erasable programmable read-only memory. An erasable memory chip used in the Evolution Two to store menu selection information.

37

continued

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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 BasicsBest Musical Performance Cast Cable ConstructionEvolution Cast Core Technologies Zero Feedback Balanced Current Mode DesignEnsuring Maximum Performance Separate Power Supply Fully Balanced Discrete Volume ControlAdvanced Microprocessor Control Custom Software Inputs and Outputs ConfigurationsDefinition of Terms Preamplifier Krell Current ModeOperation TechnologyOpening the Evolution Two Shipping Carton Unpacking and PlacementLeft/Right Channel Orientation To Remove the Preamplifier Channel from the Shipping CartonRepeat Steps 1-5 for the remaining preamplifier channels PlacementAC Power Guidelines 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, thenUse to make a left channel respond as a right channel BalanceChannel Assign Use to make a right channel respond as a left channel CloneDisplay Front panel display times out after 5 seconds InfoFront panel display is always on To select input names for other inputs, repeat Steps 3 Input Level TrimInput Name 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 Output of the Evolution Two is completely silenced MuteOutput Trigger RC-5 Control RS-232 Control Recalls the factory settingsRecall Software Clone SaveInitiates the software clone Tape InputBegins the software clone process 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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