Krell Industries EVOLUTION TWO MONAURAL PREAMPLIFIER Back Panel Description, Inputs, Outputs

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Back Panel Description

See Figure 3 on page 22

The Evolution Two Monaural Preamplifier back panel provides all input and output connections, remote control inputs and outputs, and the power connection. Back panel features and their descriptions follow.

Left/Right Channel Orientation

Evolution Two preamplifiers are assembled as left or right preamplifier channels. Preamplifier RCA connectors (31, 36, 38, 40) are color coded. Left preamplifier channels are assembled with white RCA connectors, and right preamplifier chan- nels are assembled with red RCA connectors.

Inputs

30Balanced Inputs: B-1, B-2, B-3

The Evolution Two is equipped with 3 balanced analog source inputs with XLR connectors.

31Single-ended Inputs: S-1, S-2, S-3. S-4

The Evolution Two is equipped with 4 single-ended analog source inputs with RCA connectors.

32, 33 Tape Inputs: B-3 and S-4

The Evolution Two is equipped with one balanced and one single-ended input, for use with a tape source. Either input may be configured as the tape input, from the menu (17). When you select the tape input (11), the other input becomes a normal input, selectable using the front panel button or the remote control key (8, 9).

34C-1, C-2, and C-3 CAST Inputs

The Evolution Two is equipped with 3 CAST inputs with 4-pin bayonet connec- tors, for use with Krell CAST-equipped input devices.

Outputs

35, 36 Main Bus Outputs

The Evolution Two is equipped with one balanced main bus output with XLR connectors and one single-ended main bus output with RCA connectors. Use the main bus outputs to record the input signal playing on the main outputs. For more information, see Play and Record, on page 30.

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Contents Evolution Page Contents List of Illustrations Letter from Dan D’Agostino Letter from Dan D’Agostino Krell Legacy About KrellCast Basics Voltage Signal Transmission Traditional Audio SystemHow Cast and Krell Current Mode Interact Revolutionary Krell Cast TechnologyCast 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 Technology Krell Current ModePreamplifier OperationTo Remove the Preamplifier Channel from the Shipping Carton Unpacking and PlacementOpening the Evolution Two Shipping Carton Left/Right Channel OrientationPlacement 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 Remote Functions on the Front Panel PowerFront Panel Description ChassisDisplay Preamplifier FunctionsEnter Button or Key Level ControlNavigate/Customize Menu Button or KeyBattery Installation and Removal Remote Control DescriptionAmplifier Functions Compact Disc FunctionsIEC Power Cord Receptacle 35, 36 Main Bus Outputs Back Panel DescriptionInputs Outputs43 RS-232 Remote Connections on the Back Panel37, 38 Record Bus Outputs 42 RC-5Link Control Phono Stage ConnectorConnection Steps Connecting the Evolution Two to Your SystemXLR Pin Configuration Input and Output ConnectionsNever 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 TwoEnter the menu, then Menu FunctionsAC Mains BacklightBalance 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 Input Trigger Input PhasePhase of the selected input is unaffected Phase of the selected input is inverted 180 degreesIR 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 AM to 500 PM EST Return Authorization ProcedureTo contact the Krell Service Department Service@krellonline.comControl 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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