Krell Industries manual Evolution One Monaural Power Amplifier Owner’s Reference

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Evolution One Monaural Power Amplifier 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 amplifier must be placed on a firm, level surface where it is not exposed to dripping or splash- ing.

The ventilation grids on the top of the amplifier and the space underneath the amplifier must be unobstructed at all times during operation. Do not place flammable material above or beneath the amplifier.

Before making connections to the amplifier, ensure that the back panel power switch is down. Make sure all cable terminations are of the highest quality, free from frayed ends, short circuits, or cold solder joints.

The differential circuitry employed with an Evolution One Monaural Power Amplifier requires special attention when connecting speakers. Do not connect the negative speaker terminals together. Do not connect the negative speaker terminals to ground.

Do not connect an Evolution One Monaural Power Amplifier to a loudspeaker selector device that employs a common ground scheme, as it may short-circuit the amplifier output.

THERE ARE NO USER SERVICEABLE PARTS INSIDE AN EVOLUTION ONE MONAURAL POWER AMPLIFIER.

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. 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 307772

 

 

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Contents Evolution Evolution One Monaural Power Amplifier Owner’s Reference Contents List of Illustrations Letter from Dan D’Agostino Letter from Dan D’Agostino About Krell Krell LegacySection ONE About Krell Revolutionary Krell Cast Technology Voltage Signal Transmission Traditional Audio SystemHow Cast and Krell Current Mode Interact Cast BasicsBest Musical Performance Cast Cable ConstructionEvolution Cast Ensuring Maximum Performance Core TechnologiesImpedance Advantage Evolution Bias Control SystemsSeparate Power Supplies Are Quiet and Powerful Operation Definition of TermsInputs and Outputs Operational Mode TechnologyTo Remove the Chassis from the Shipping Carton Unpacking and PlacementOpening the Amplifier Shipping Carton People needed Placement AC Power GuidelinesThis section describes Evolution One features and benefits Anatomy of an AmplifierEvolution One Amplifier and Power Supply Chassis Back Panels Evolution One Amplifier Chassis Top Evolution One Power Supply Chassis Top Balanced Connections Connecting the Evolution One to Your SystemCast Connections Cable Connection StepsDC Protection Circuitry / Using a Tube Preamplifier Turn to Amplifier Operation, onVolt Trigger Remote Control OptionsRC-5 Remote Control Powering On, Powering Down, and Powering Off Amplifier OperationSwitching Between Cast and Balanced Inputs Turning Off the Lights on the Amplifier Channel Front Panel Adjusting Power Meter ModesPower Meter Range and Power Meter Wand Action Amplifier Care Amplifier Troubleshooting System ProtectionDiagnostic Codes Possible Condition Course of Action Warranty Page Return Authorization Procedure To contact the Krell Service DepartmentSpecifications

Evolution One specifications

Krell Industries is synonymous with high-fidelity audio and innovative engineering, showcasing their prowess in speaker design with the Evolution One. This speaker embodies the cutting-edge technology and striking aesthetics that Krell is recognized for in the audiophile community.

The Evolution One features a unique dual-woofer configuration, delivering powerful bass response without distortion. Each woofer is meticulously crafted from advanced composite materials, ensuring that the sound remains accurate and dynamic, even at high volumes. This design aligns perfectly with Krell's dedication to reproducing music with the utmost authenticity.

At the heart of the Evolution One is Krell's proprietary CAST (Current Mode Amplification) technology. This innovation sets Krell apart from competitors by allowing the signal to flow through a path that maintains the purity of the audio signal. By operating in current mode rather than voltage mode, CAST drastically reduces the impact of circuit interference that often plagues traditional audio systems. The result is a level of transparency and low distortion that appeals to even the most discerning audiophiles.

The speaker also incorporates advanced crossover technology, which seamlessly integrates the woofers and tweeter. Krell employs a fourth-order Linkwitz-Riley crossover to ensure that the different drivers work in perfect harmony. This feature aids in achieving a balanced and cohesive soundstage, enhancing the listening experience across various musical genres.

Visually, the Evolution One is a statement piece. Its sleek, modern design is complemented by a high-gloss finish, ensuring it not only sounds exceptional but also serves as an elegant addition to any audio setup. The robust cabinet construction eliminates unwanted vibrations, further enhancing sound clarity.

Moreover, the Evolution One is equipped with advanced bi-wiring and bi-amping options, allowing audiophiles to optimize their setups based on personal preferences and system requirements. This flexibility makes the Evolution One an adaptable choice for those looking to refine their audio systems further.

In summary, the Krell Industries Evolution One is a culmination of innovative technology, premium materials, and exquisite design. With features such as dual-woofer configurations, CAST technology, and advanced crossover design, it stands as a testament to Krell's commitment to delivering high-fidelity audio experiences that resonate with both casual listeners and dedicated audiophiles alike.