Related Manuals for Krell Industries EVOLUTION TWO MONAURAL PREAMPLIFIER
Summary of Contents for Krell Industries EVOLUTION TWO MONAURAL PREAMPLIFIER
- Page 1 EVOLUTION E V O L U T I O N T W O M O N A U R A L P R E A M P L I F I E R O W N E R ’ S R E F E R E N C E...
- Page 2 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.
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Page 3: Table Of Contents
Contents List of Illustrations, page iv A Letter from Dan D’Agostino, page 1 SECTION ONE: About Krell, page 3 The Krell Legacy, Revolutionary Krell CAST Technology, Ensuring Maximum Performance, Definition of Terms SECTION TWO: Unpacking and Placement, page 11 Opening the Evolution Two Shipping Carton SECTION THREE: Quick Start, page 13 Connecting the Evolution to Your System, Operating the Evolution Two... -
Page 4: List Of Illustrations
List of Illustrations Figure 1, page 15 Evolution Two Preamplifier Chassis and Power Supply Chassis Front Panels Inset Evolution Two Preamplifier Channel: Front Panel View Figure 2, page 16 Evolution Two Remote Control Figure 3, page 22 Evolution Two Preamplifier Chassis and Power Supply Chassis Back Panels... -
Page 5: A Letter From Dan D'agostino
A Letter from Dan D’Agostino Dear Audio Enthusiast, Thank you for your purchase of the Evolution Two preamplifier. My new Evolution products represent a watershed in my design philosophy and in my quest for audio components that deliver absolute truth in music reproduction. The expanse of the Evolution Two monaural design has allowed me to explore fully the advantages of current mode topologies. - Page 6 (A Letter from Dan D’Agostino continued) I have some exciting news for you. Work on a new source component for the Evolution Series is ongoing as of this writing. Possessed of the unique Evolution technologies that power the amplifier and preamplifier, this Evolution source will expose the real advantages of the latest recording formats while taking compact disc playback to the next level.
- Page 7 SECTION About Krell This section describes the Krell Legacy, the innovative features and technology of the Evolution Two, and defines CAST and other key terms used in this reference. The Krell Legacy “I design every Krell component to set the standard for workmanship, style, and performance.”...
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Page 8: Section One: About Krell
(SECTION ONE: About Krell continued) Revolutionary Krell CAST Technology Current Audio Signal Transmission, termed CAST, is a revolutionary method of connecting analog audio components for unparalleled sonic performance. Innovative engineering combines the new Krell CAST circuitry with existing Krell Current Mode technology to create entire CAST systems that reproduce music with incredible range, tonality, and precision. - Page 9 CAST preserves the transmitted signal between components. Together, CAST and Krell Current Mode technologies unify separate Krell components into a single global circuit. Krell Current Mode technology enjoys bandwidth increases up to an order of magnitude greater than their voltage based counterparts. This dramatic increase in circuit bandwidth delivers near perfection in the audible band that typi- cally suffers from phase distortions in voltage circuits.
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Page 10: Core Technologies
(SECTION ONE: About Krell continued) Ensuring Maximum Performance “My pursuit of excellence in sound reproduction and my love of great musical performance fuels the ongoing Evolution design effort at Krell.” The product of breakthrough Krell technology, the Evolution Two Monaural Preamplifier works in tandem with the Evolution One Monaural Power Amplifier to provide a sound that is supremely dynamic and musical. - Page 11 Fully Balanced Discrete Volume Control The volume control is realized with a 16-bit balanced resistor ladder, which uses low-resistance, high-linearity solid-state switches and discrete precision resistors. Control signals for the switches are optically coupled for low noise and maximum signal integrity. The bandwidth and transient response of the preamplifier circuitry are virtually unaffected by the volume setting.
- Page 12 (SECTION ONE: About Krell continued) (Separate Power Supply continued) trol circuitry team ultra-stable voltage reference chips with the same discrete high- current driver and output transistors used in the main analog regulators. These ample power reserves are brought to the Evolution Two via high reliability 12-pin connectors with machined, gold plated, three-amp contacts.
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Page 13: Definition Of Terms
Definition of Terms Following are the definitions of key terms used in this owner’s reference. Configurations CAN Link The communication system that links multiple Evolution Two preamplifier channels is a sophisticated system called a controller area network (CAN). Linked Mode In linked mode, functions including power, volume, balance, phase, record, mute, and input selections are instantaneously transmitted between linked preamplifier channels. -
Page 14: Operation
(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. -
Page 15: Unpacking And Placement
SECTION Unpacking and Placement This section describes the procedures for safely unpacking and placing your Evolution Two Monaural Preamplifier. Each Evolution Two preamplifier channel is shipped in 1 carton consisting of 2 chassis: 1 power supply chassis and 1 pream- plifier chassis. -
Page 16: Ac Power Guidelines
(SECTION TWO: Unpacking and Placement continued) (To Remove the Preamplifier from the Shipping Box continued) Carefully remove the preamplifier chassis, power supply chassis, and acces- sories from the box. Place the the preamplifier chassis and power supply chassis in a safe location and remove the protective plastic wrapping. -
Page 17: Quick Start
THREE SECTION Quick Start To access the full array of available functions for the Evolution Two Monaural Preamplifier, please read the entire owner’s reference manual. The abbreviated routine in this Quick Start section will allow you to connect and operate the Evolution Two quickly and enjoy its basic functions. -
Page 18: Section Three: Quick Start
(SECTION THREE: Quick Start) (Connecting the Evolution Two To Your System continued) On each preamplifier channel, connect the supplied AC power cord to the IEC power cord receptacle (48). On each preamplifier channel, plug the AC power cord into AC power. The front panel display (15) scrolls through red stand-by LEDs illuminate (4), indicating that the Evolution Two preamplifier is in stand-by mode. - Page 19 FOUR SECTION Anatomy of an Evolution Two This section describes Evolution Two Monaural Preamplifier functions. Figure 1 Evolution Two Preamplifier Chassis and Power Supply Chassis Front Panels POWER 1 Preamplifier Chassis Chassis 2 Power Supply Chassis Power 3 Power Button 4 Stand-by LED 5 Power Backlight Remote...
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Page 20: Section Four: Anatomy Of An Evolution Two
(SECTION FOUR: Anatomy of an Evolution Two continued) Figure 2 Evolution Two Remote Control 3 Power Key Power 8 Single-ended Input Preamplifier Functions Selection Keys 9 Balanced Input Selection Keys 10 CAST Input Selection Keys 11 Tape Key 12 Mute Key 13 Record Key 14 Phase Key 21 Main Bus Key... -
Page 21: Front Panel Description
Front Panel Description See Figure 1 on page 15 Each Evolution Two Monaural Preamplifier channel is comprised of two chas- sis, the preamplifier chassis and the power supply chassis. Front panel func- tions and their descriptions follow. Chassis 1 Preamplifier Chassis The preamplifier chassis front panel provides power on, input and zone selec- tion, level control, menu functions, and status display. - Page 22 (SECTION FOUR: Anatomy of an Evolution Two continued) Preamplifier Functions 8, 9, 10 Input Select Buttons or Keys Use these buttons to select the corresponding rear panel input that is connect- ed to a CAST (C-1, C-2, C-3), balanced (B-1, B-2, B-3), or single-ended (S-1, S-2, S-3, S-4) analog source.
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Page 23: Level Control
Level Control 16 Level Control Knob or Level Keys Use this knob or keys to increase or decrease system volume level or, with the balance key (22), to adjust balance. The level control knob or keys also select menu options that customize the Evolution Two. See Customizing the Evolution Two, on page 32. -
Page 24: Battery Installation And Removal
(SECTION FOUR: Anatomy of an Evolution Two continued) Remote Control Description See Figure 2 on page 16 The Evolution Two Monaural Preamplifier remote provides all of the power, pream- plifier, level control, and navigate/customize functions outlined under Front Panel Description, pages 17-19. The remote control provides additional functions, including CD functions and menu configuration, accessed using only the remote control keys. -
Page 25: Amplifier Functions
Compact Disc Functions The compact disc keys of the Evolution Two remote control are functional with all Krell compact disc players. 23 Pause Key Use this key to temporarily suspend playing the current compact disc track. Press pause again or press the play key (24), to resume playing the track at the point pause was engaged. - Page 26 48 IEC Power Cord Receptacle EVOLUTION TWO EVOLUTION TWO MAIN BUS RECORD BUS TAPE OUTPUTS 39 40 EVOLUTION TWO EVOLUTION TWO KRELL INDUSTRIES, INC. 45 CONNAIR ROAD ORANGE, CT 06477-3650 NO USER SERVICEABLE PARTS INSIDE LINK LINK MAIN OUTPUTS POWER POWER...
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Page 27: Back Panel Description
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. - Page 28 (SECTION FOUR: Anatomy of an Evolution Two continued) (Outputs continued) 37, 38 Record Bus Outputs The Evolution Two is equipped with one balanced record bus output with XLR connectors and one single-ended record bus output with RCA connectors. Use the record bus outputs to record a input signal other than the signal playing on the main outputs.
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Page 29: Link Control
systems to be easily coordinated. For more information on customizing the 12 V trigger, see Input Trigger, on page 39. Mono 1/8” mini connectors are used in the following configuration: Tip = +12 V, Sleeve = GND. Notes When the Evolution Two is in the operational mode, the 12 V trigger provides 12 Volts of DC output. -
Page 30: Connection Steps
FIVE SECTION Connecting the Evolution Two to Your System This section describes Evolution Two Monaural Preamplifier connections and intro- duces the CAN Link remote control option. Input and Output Connections Krell recommends using its proprietary Krell CAST system for unparalleled sonic performance for connections between the Evolution Two preamplifier and other CAST-equipped components. - Page 31 The following steps describe how to connect an Evolution Two preamplifier to your system: Connect each power supply chassis and preamplifier chassis with the 12-pin DC cable provided, using the DC power connectors (47) on the back panels (1-2). IMPORTANT Never connect two power supplies together.
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Page 32: Section Five: Connecting The Evolution Two To Your System
(SECTION FIVE: Connecting the Evolution Two to Your System continued) Connections Using CAN Link The Evolution Two brings a new convenience to the operation of monaural pream- plifiers, using a sophisticated, reliable control system called a controller area net- work (CAN). -
Page 33: On/Off And Stand-By Operation
SECTION Evolution Two Operation The Evolution Two Monaural Preamplifer is easy to operate. Instructions follow for on/off and stand-by operation. IMPORTANT Always mute or fully attenuate the preamplifier level when switching sources. Do not change input connections to the amplifier when the amplifier is on. Use care when setting high playback levels. -
Page 34: Section Six: Evolution Two Operation
(SECTION SIX: Evolution Two Operation continued) To Turn Off Your System Place the amplifiers in the stand-by mode. Press the power button on the preamplifier chassis front panel or the pwr key (3) on the remote control to switch the Evolution Two to the stand-by mode. Turn off the amplifiers using the back panel power switch or by disconnecting them from AC power. -
Page 35: Operation Using Can Link
Operation Using CAN Link When a system with linked Evolution Two preamplifier channels is powered on, left/right orientation is established immediately, with no user intervention. The input selections and the power, volume, balance, phase, record, and mute adjustments you make on any preamplifier channel are instantly transmitted between all linked preamplifier channels. -
Page 36: Navigation Conventions
SEVEN SECTION Customizing the Evolution Two The Evolution Two Monaural Preamplifier easy-to-use menu allows you to config- ure the following functions. You can also use the menu to review version informa- tion about the software, hardware, and firmware installed in the Evolution Two: AC Mains, page 33 Backlight,... -
Page 37: Menu Functions
Menu Functions AC Mains This function enables you to operate the Evolution Two from a switched AC outlet. If AC Mains is set to the preamplifier turns on immediately, by-passing stand- by. Thereafter, you may switch the preamplifier to and from stand-by, using the power button or pwr key (3). -
Page 38: Section Seven: Customizing The Evolution Two
(SECTION SEVEN: Customizing the Evolution Two continued) Balance This function enables you to select the balance between the left and right chan- nels. The options are: Enter the menu, then: Use the level control knob on the preamplifier chassis front panel or up and down keys (16) on the remote control to select: Press the enter button on the preamplifier chassis front panel or the enter key (18) on the remote control... -
Page 39: Clone
FORCE RIGHT Use to make a right channel respond as a left channel. FORCE NONE The preamplifier channel ignores balance selections. Use this option to set up more than 2 preamplifier channels. NO OVERRIDE Return to CHANNEL ASSIGN. items. For more information on linked preamplifiers, see Appendix: CAN Link and Multiple Evolution Two Preamplifiers, on page 51. -
Page 40: Display
(SECTION SEVEN: Customizing the Evolution Two continued) CLONE BEGIN Sends the message that a clone is about to begin, from the clone transmitter to the clone receiver(s). CLONE TRANSMIT Once the clone begin message is sent, the clone transmitter display reads: TRANSMIT, CLONE RECEIVE Once the clone begin message is sent, the clone receiver(s) display reads:... -
Page 41: Info
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 display is at 50% of brightness when in menu mode, and turns completely off when you leave the menu mode. -
Page 42: Input Level Trim
(SECTION SEVEN: Customizing the Evolution Two continued) Input Level Trim This function enables you to select an input offset for a particular input. The options are: Enter the menu, then: Use the level control knob on the preamplifier chassis front panel or the up and down keys (16) on the remote control to select: Press the enter button on the preamplifier chassis front panel or the enter key (18) on the remote control... -
Page 43: Input Phase
Input Phase This function enables you to invert the absolute polarity of the selected input 180 degrees. The selections are: Enter the menu, then: Use the level control knob on the preamplifier chassis front panel or the up and down keys (16) on the remote control to select: Press the enter button on the preamplifier chassis front panel or the enter key (18) on the remote control mode:... -
Page 44: Ir Out Control
(SECTION SEVEN: Customizing the Evolution Two continued) (Input Trigger continued) The Evolution Two does not respond to 12 V input trigger commands. NORMAL The Evolution Two responds to 12 V input trigger commands. THEATER The Evolution Two responds to 12 V input trigger commands, and the theater mode enabled input is selected automatically. -
Page 45: Link Control
Link Control (CAN Link) This function enables you to link and unlink preamplifiers. The options are: UNLINKED. Enter the menu, then: Use the level control knob on the preamplifier chassis front panel or the up and down keys (16) on the remote control to select: Press the enter button on the preamplifier chassis front panel or the enter key (18) on the remote control mode:... -
Page 46: Mute
(SECTION SEVEN: Customizing the Evolution Two continued) Mute This function enables you to control the mute mode. The options are: BACK. Enter the menu, then: Use the level control knob on the preamplifier chassis front panel or up and down keys (16) on the remote control to select: Press the enter button on the preamplifier chassis front panel or the or enter key (18) on the remote control mode:... -
Page 47: Rc-5 Control
Use the level control knob or up and down keys to scroll to: Press the enter button or key to return to: Use the level control knob or the up and down keys to scroll to: Repeat Steps 3-7 to set Trigger 2. The 12 Volt trigger output is enabled at power on for the selected trigger (Trigger 1 or 2). -
Page 48: Recall
(SECTION SEVEN: Customizing the Evolution Two continued) Recall This function enables you to access factory default settings or your own saved settings, or to undo a clone. The options are: Enter the menu, then: Use the level control knob on the preamplifier channel front panel or up and down keys (16) on the remote control to select: Press the enter button on the preamplifier channel front panel or the or enter key (18) on the remote control. -
Page 49: Save
Press the enter button or key to confirm the selection. The front panel display reads: RS-232 CONTROL. The right-terminated preamplifier channel is the link transmitter of RS-232 data. Connect the RS-232 cable to the RS-232 connector on the right-terminated pre- amplifier channel. -
Page 50: Tape Input
(SECTION SEVEN: Customizing the Evolution Two continued) (Software Clone continued) Press the enter button or the enter key (18) again the clone transmitter shows the default: Use the level control knob on the clone transmitter or the up and down keys to select: Press the enter button on the clone transmitter. -
Page 51: Theater Mode
Theater Mode This function enables you to select theater mode volume for a particular input. Use this function when connecting the output of a preamp/processor to the Evolution Two for home theater applications. Configuring an input for theater mode sets that input for unity gain and suspends the level control of the Evolution Two. -
Page 52: Volume Display
(SECTION SEVEN: Customizing the Evolution Two continued) Volume Display This function enables you to select the numeric mode for the volume display, dis- playing values from softest to loudest: 0 to 151. Alternatively, you can select the dB mode for the volume display, displaying values from softest to loudest: -inf to +12 dB. -
Page 53: Questions And Answers
EIGHT SECTION Questions and Answers Why does the second preamplifier channel not respond when I select an input or adjust the volume on the other preamplifier channel? The two preamplifier channels must be linked together using the RJ-45 cable in order for functions to be sent between preamplifier channels. I renamed the B-1 input on one of the preamplifier channels. -
Page 54: Section Eight: Questions And Answers
(SECTION EIGHT: Questions and Answers continued) Troubleshooting System Noise When you mix and match high-performance audio components, each with its own ground potential, a low frequency hum may occur in one or both loudspeakers. If this happens when you place the Evolution Two preamplifier into your system, follow these simple troubleshooting steps. -
Page 55: Appendix: Can Link And Multiple Evolution Two Preamplifiers
Appendix: CAN Link and Multiple Evolution Two Preamplifiers The Evolution Two Monaural Preamplifier brings a new convenience to the opera- tion of monaural preamplifiers, using a sophisticated, reliable control system called a controller area network linked preamplifier channels to be controlled from any single linked preamplifier channel in the system. - Page 56 (Appendix: CAN Link and Multiple Evolution Two Preamplifiers continued) Left/Right Channel Orientation Evolution Two preamplifiers are assembled as left or right channels. Preamplifier RCA connectors (31, 36, 38, 40) are color coded. Left preamplifier channels are assembled with white RCA connectors, and right preamplifier channels are assembled with red RCA connectors.
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Page 57: Warranty
Warranty Each Evolution Series preamplifier has a limited warranty of five years for parts and labor on circuitry. Should this product fail to perform at any time during the warran- ty, Krell will repair it at no cost to the owner, except as set forth in this warranty. This warranty does not apply to damage caused by acts of God or nature. - Page 58 (Warranty continued) Krell will pay return freight to the U.S.A.-based freight forwarder of your choice. Freight and other charges to ship the unit from the freight forwarder to you are also your responsibility. Krell is not responsible for any damage incurred in transit. Krell will file claims for damages as necessary for units damaged in transit to the factory.
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Page 59: Return Authorization Procedure
Return Authorization Procedure If you believe there is a problem with your component, please contact your dealer, distributor, or the Krell factory to discuss the problem before you return the com- ponent for repair. To expedite service, you may wish to complete and e-mail the Service Request Form in the Service Section of our website at: http://www.krellonline.com To contact the Krell Service Department... -
Page 60: Specifications
Specifications Inputs 3 CAST via 4-pin bayonet connectors 3 balanced via XLR connectors 4 single-ended via RCA connectors Tape input 1 balanced via XLR connector or 1 single-ended via RCA connector, user configurable Main outputs 2 CAST via 4-pin bayonet connectors 1 balanced via XLR connector 1 single-ended via RCA connector Tape outputs...
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