Krell Industries EVOLUTION TWO MONAURAL PREAMPLIFIER manual

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Evolution Two Monaural Preamplifier

Owner’s Reference, v05.0

Krell Industries, Inc.

45 Connair Road

Orange, CT 06477-3650 USA

TEL 203-799-9954

FAX 203-891-2028

E-MAIL Krell@krellonline.com

WEBSITE http://www.krellonline.com

This product complies with the EMC directive (89/336/EEC) and the low-voltage directive (73/23/EEC).

WARNINGS

The Evolution Two preamplifier must be placed on a firm, level surface where it is not exposed to dripping or splashing.

The ventilation grids on the top of the Evolution Two preamplifier and the space underneath the Evolution Two preamplifier must be unobstructed at all times during operation. Do not place flam- mable material above or beneath the preamplifier.

Before making connections to the Evolution Two preamplifier, ensure that the power is off and other components are in mute or stand-by mode. Make sure all cable terminations are of the highest quali- ty, free from frayed ends, short circuits, or cold solder joints.

Do not connect an RS-232 cable to the phono power port. Output from the phono power port can seriously damage your computer. Do not connect the cable from a Krell KPE phono stage to the RS-232 port.

THERE ARE NO USER SERVICEABLE PARTS INSIDE AN EVOLUTION TWO MONAURAL PREAMPLIFIER.

Please contact Krell if you have questions not addressed in this guide.

This product is manufactured in the United States of America. Krell® is a registered trademark of Krell Industries, Inc., and is restricted for use by Krell Industries, Inc., its subsidiaries, and authorized agents. Evolution Bias™ is a trademark of Krell Industries, Inc. and is a Krell technology based on U.S. Patent No. 5,331,291. CAN Link™, CAST™, Evolution CAST™, and Krell Current Mode™ are trademarks of Krell Industries, Inc. All other trademarks are registered to their respective companies.

© 2005 by Krell Industries, Inc. All rights reserved

P/N 307773

 

 

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Contents Evolution Page Contents List of Illustrations Letter from Dan D’Agostino Letter from Dan D’Agostino About Krell Krell LegacyRevolutionary Krell Cast Technology Voltage Signal Transmission Traditional Audio SystemHow Cast and Krell Current Mode Interact Cast BasicsBest Musical Performance Cast Cable ConstructionEvolution Cast Core Technologies Zero Feedback Balanced Current Mode DesignEnsuring Maximum Performance Fully Balanced Discrete Volume Control Separate Power SupplyAdvanced Microprocessor Control Custom Software Inputs and Outputs ConfigurationsDefinition of Terms Operation Krell Current ModePreamplifier TechnologyLeft/Right Channel Orientation Unpacking and PlacementOpening the Evolution Two Shipping Carton To Remove the Preamplifier Channel from the Shipping CartonRepeat Steps 1-5 for the remaining preamplifier channels PlacementAC Power Guidelines Connecting the Evolution Two to Your System Quick StartOperating the Evolution Two Linked Mode Anatomy of an Evolution Two 11 12 13Evolution Two Remote Control Chassis PowerFront Panel Description Remote Functions on the Front PanelPreamplifier Functions DisplayMenu Button or Key Level ControlNavigate/Customize Enter Button or KeyRemote Control Description Battery Installation and RemovalCompact Disc Functions Amplifier FunctionsIEC Power Cord Receptacle Outputs Back Panel DescriptionInputs 35, 36 Main Bus Outputs42 RC-5 Remote Connections on the Back Panel37, 38 Record Bus Outputs 43 RS-232Phono Stage Connector Link ControlInput and Output Connections Connecting the Evolution Two to Your SystemXLR Pin Configuration Connection StepsNever connect two power supplies together Connections Using can Link To Connect Multiple Evolution Two Preamplifiers via can LinkOn/Off and Stand-by Operation Linked Mode Evolution Two OperationPlay and Record To Turn Off Your SystemOperation Using can Link Customizing the Evolution Two Navigation ConventionsBacklight Menu FunctionsAC Mains Enter the menu, thenUse to make a left channel respond as a right channel BalanceChannel Assign Clone Use to make a right channel respond as a left channelDisplay 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 inverted 180 degrees Input PhasePhase of the selected input is unaffected Input TriggerEvolution Two responds to 12 V input trigger commands IR Out ControlLink Control can Link Output of the Evolution Two is completely silenced MuteOutput Trigger RC-5 Control RS-232 Control Recalls the factory settingsRecall Save Software CloneInitiates the software clone Tape InputBegins the software clone process Theater Mode Volume Display +12 dB. The options are Enter the menu, thenQuestions and Answers Troubleshooting System Noise Appendix can Link and Multiple Evolution Two Preamplifiers Connection of multiple preamplifier channelsAppendix can Link and Multiple Evolution Two Preamplifiers Warranty Warranty Service@krellonline.com Return Authorization ProcedureTo contact the Krell Service Department AM to 500 PM ESTSpecifications Control outputs

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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