Krell Industries EVOLUTION TWO MONAURAL PREAMPLIFIER Preamplifier, Operation, Technology, Channel

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(SECTION ONE: About Krell continued)

Preamplifier

Channel

Also termed preamplifier or preamplifier channel. A channel is one Evolution Two, comprised of one preamplifier chassis and one power supply chassis.

Right-terminated channel

Any right preamplifier channel that is last in a chain of linked Evolution preampli- fiers is referred to as right-terminated. There is only one RG-45 link cable connect- ed to a right-terminated channel.

Transmitter

Also termed transmitter preamplifier. The transmitter is a right-terminated preampli- fier channel that sends IR, RC-5, and RS-232 data to the other linked preamplifier channel(s), or receiver(s).

Receiver

Also termed receiver preamplifier. Receivers are linked preamplifier channels that receive IR, RC 5, and RS-232 data from a right terminated preamplifier channel, or transmitter.

Operation

Off

When the stand-by/power LEDs and the backlight grid are not illuminated, the pre- amplifier is off.

Stand-by

A low power consumption status that keeps the audio and regulator circuits at idle. The stand-by/power LEDs are illuminated in red, when the preamplifier chan- nel is in the stand-by mode. Krell recommends leaving the preamplifier in the stand-by mode when it is not playing music.

Operation

When the backlight is illuminated in blue, the preamplifier is in the operational mode and ready to play music.

Technology

Krell Current Mode

A proprietary Krell circuit topology in which the audio gain stages of a component operate in the current rather than voltage domain. This unique technology provides the component with exceptional speed, and a wide bandwidth.

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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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