Krell Industries Evolution 202 Owner's Reference Manual
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- Page 1 EVOLUTION EVOLUTION E V O L U T I O N 2 0 2 E V O L U T I O N 2 0 2 S T E R E O P R E A M P L I F I E R S T E R E O P R E A M P L I F I E R O W N E R ’...
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Page 2: Important Safety Instructions
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 202 PREAMPLIFIER. -
Page 3: Table Of Contents
List of Illustrations, page 4 A Letter from Dan D’Agostino, page 5 SECTION ONE: Evolution 202 Features and Technology, page 6 Features, Revolutionary Krell CAST Technology, Definition of Terms SECTION TWO: Unpacking and Placement, page 11 Opening the Evolution 202 Shipping Carton... -
Page 4: List Of Illustrations
List of Illustrations Figure 1, page 15 Evolution 202 Preamplifier and Power Supply Front Panels Inset Preamplifier and Power Supply Stacked View Figure 2, page 19 Evolution 202 Remote Control Figure 3, page 22 Evolution 202 Preamplifier and Power Supply Back Panels... -
Page 5: A Letter From Dan D'agostino
My new Evolution 202 preamplifier employs a powerful, separate power supply, Krell Current Mode gain stages from input to output, and Current Audio Signal Transmission (CAST) receivers and transmitters. Utilizing these powerful technolo- gies, the Evolution 202 conveys the complete range of timbre and dynamics that comprise the foundation musical performance. - Page 6 The Evolution 202 has a 1 MHz open loop bandwidth in a zero feedback, bal- anced Krell Current Mode design, terminating in Evolution CAST ™. CAST inputs and outputs drive a newly designed current mode balanced input stage. Class A, balanced circuitry is used throughout.
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Page 7: Revolutionary Krell Cast Technology
Here is how a CAST audio system works. Internally, each CAST source transfers, or amplifies, current using Krell Current Mode circuitry. This current signal is then output using CAST circuitry. When the signal is received by a CAST input, Krell Current Mode circuitry again takes over until the signal reaches the loudspeaker. -
Page 8: Section One: Evolution 202 Features And Technology
The goal for CAST is the same company goal used for all Krell products. Krell strives for the delivery of the best performance of a musical event for you, using the full expres-... -
Page 9: Definition Of Terms
CAST and Evolution CAST Krell Current Audio Signal Transmission, or CAST, is a proprietary Krell circuit tech- nology for connecting analog components, transmitting the audio waveform between components in the current domain rather than in the voltage domain. The... - Page 10 (SECTION ONE: Definition of Terms continued) 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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Page 11: Opening The Evolution 202 Shipping Carton
Place the preamplifier and power supply in a safe location, and remove the protective plastic wrapping. Place the power supply chassis where you intend to use the preamplifier. Krell recommends that you place the preamplifier chassis on top of the power supply chassis. continued... - Page 12 (SECTION TWO: Unpacking and Placement continued) Placement Before you install an Evolution 202 preamplifier into your system, please follow the guidelines in this section to select a location for your component. This will facili- tate a clean, trouble-free installation. The Evolution 202 preamplifier does not require a special rack or cabinet for instal- lation.
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Page 13: Quick Start
Use only the power cord provided with the preamplifier to make the connection to AC power. Operation with a power cord other than the one supplied by Krell could induce noise, limit current, or otherwise impair the ability of the preamplifier to perform optimally. -
Page 14: Section Three: Quick Start
(14) or the remote level keys to set the volume to a comfortable level. To return the preamplifier to the stand-by mode, press the power button (1) or remote power key. Krell recommends leaving the Evolution 202 in the stand-by mode when it is not playing music. - Page 15 FOUR SECTION Anatomy of the Evolution 202 This section describes the Evolution 202 Preamplifier functions. Figure 1 Evolution 202 Preamplifier and Power Supply Front Panels Power Power Button Stand-by/Power LED Infrared Emitter Remote Functions Infrared Sensor Front Panel Display Display Navigate/ Menu Button Customize...
- Page 16 2 Infrared Emitter The stand-by/Power LED (7) flashes when the Evolution 202 sends signals via this infrared emitter to a programmable remote control, such as the Universal Krell Touch Screen Remote. See IR Out Control, on page 36. 4 Infrared Sensor The infrared sensor receives commands from the Evolution 202 remote control.
- Page 17 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), balanced (B-1, B-2), or single-ended (S-1, S-2, S-3) analog source. The front panel display shows the selected input and volume level.
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Page 18: Level Control
(SECTION FOUR: Anatomy of an Evolution 202 continued) Level Control 14 Level Control Knob or Level Keys Use this knob or keys to increase or decrease system volume level or, with the balance key (C), to adjust balance. The level control knob or keys also select menu options that customize the Evolution 202. - Page 19 Figure 2 Evolution 202 Remote Control Power Power Key Navigate/ Menu Key Customize Enter Key Input Single-ended Input Selectors Selection Keys Balanced Input Selection Keys CAST Input Selection Keys Tape Selection Key Mute Mute Key Phase Phase Key Level Level Keys Amplifier Amp Pwr Key Functions...
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Page 20: Remote Control Description
Use this key to activate Krell amplifiers connected to your system. B Sel (Meter Select) Key Use this key to select the meter range of the power meter scale on the front of a Krell Evolution One power amplifier. Please refer to the Evolution One Owner’s Reference,... - Page 21 Use these with the level keys (14) to adjust the left and right channel balance. Compact Disc and DVD Functions The compact disc and DVD dual-purpose keys of the remote control are function- al with all Krell compact disc and DVD players. H CD Key Use this to activate CD functions.
- Page 22 (SECTION FOUR: Anatomy of an Evolution 202 continued) Figure 3 Evolution 202 Preamplifier and Power Supply Back Panels Inputs Balanced Inputs: B-1, B-2 Single-ended Inputs: S-1, S-2, S-3 Tape Input CAST Inputs: C-1, C-2 Outputs Tape Output Main Outputs: Single-ended Main Output Balanced Main Output CAST Outputs Configurations...
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Page 23: Back Panel Description
17 Tape Input This is a single-ended tape input, for use with a tape source. 18 C-1 and C-2 CAST Inputs These are CAST inputs with 4-pin bayonet connectors, for use with Krell CAST-equipped input devices. Outputs 19 Tape Output This single-ended analog output is used for recording the selected input source. - Page 24 The preamplifier has 2 outputs that send, and one input that receives 12 VDC power on/off (12 V trigger) signals to and from other Krell components and other devices that incorporate a 12 V trigger. This allows you to turn other components on or off, or to and from stand-by, through the remote control.
- Page 25 Phono Stage Connector 28 Phono Power Port This port is used for connecting the preamplifier to a Krell KPE phono stage. Power 24 DC Power Connector This is used to connect the preamplifier chassis and the power supply chassis, using the provided 12-pin DC power cable.
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Page 26: Connecting The Evolution 202 To Your System
This section describes Evolution 202 Preamplifier connections. Input and Output Connections Krell recommends using its proprietary Krell CAST system for unparalleled sonic performance for connections between the Evolution 202 preamplifier and other CAST-equipped components. Krell CAST uses flexible interconnecting cables that can be drawn through tight spaces and concealed. -
Page 27: Connection Steps
Use only the power cord provided with the preamplifier channel to make the connec- tion to AC power. Operation with a power cord other than the one supplied by Krell could induce noise, limit current, or otherwise impair the ability of the preamplifier chan-... -
Page 28: On/Off And Stand-By Operation
To return to the stand-by mode, press the power button or pwr key. Krell recommends leaving the Evolution 202 in the stand-by mode when it is not playing music. Turn the Evolution 202 off when the system is not being used for an extended period of time. -
Page 29: Navigation Conventions
SEVEN SECTION Customizing the Evolution 202 The Evolution 202 Preamplifier easy-to-use menu allows you to configure the fol- lowing functions. You can also use the menu to review version information about the software, hardware, and firmware installed in the Evolution 202: AC Mains, Input Phase, Recall,... -
Page 30: Ac Mains
(SECTION SEVEN: Customizing the Evolution 202 continued) Menu Functions AC Mains This function enables you to operate the Evolution 202 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 (1). -
Page 31: Balance (Channel)
Balance (channel) This function enables you to adjust the balance between the left and right output channels. The options are: CENTER, L .5-5 dB <, R .5-5 dB >. Enter the menu, then: Use the level control knob on the preamplifier front panel or up and down keys (14) on the remote control to select: BALANCE. -
Page 32: Display
(SECTION SEVEN: Customizing the Evolution 202 continued) Display This function enables you to turn on the front panel display (3) all the time, or turn it off after a time out. The options are: TIMED. Enter the menu, then: Use the level control knob on the preamplifier front panel or the up and down keys on the remote control (14) to select: DISPLAY. -
Page 33: Info
Info This function enables you to access information about the preamplifier software, EEPROM, and PC Boards. The PC Boards are listed in the left margin, on this page. Enter the menu, then: Use the level control knob on the preamplifier front panel or up and down keys (14) on the remote control to select: INFO. -
Page 34: Input Level Trim
(SECTION SEVEN: Customizing the Evolution 202 continued) Input Level Trim This function enables you to select an input offset for a particular input. The options are: in 1 dB increments +/-6 dB, Enter the menu, then: Use the level control knob on the preamplifier front panel or the up and down keys (14) on the remote control to select: INPUT LEVEL TRIM. -
Page 35: Input Phase
Input Phase This function enables you to invert the absolute polarity of the selected input 180 degrees. The selections are: NORMAL, INVERT. Enter the menu, then: Use the level control knob on the preamplifier front panel or the up and down keys (14) on the remote control to select: INPUT PHASE. -
Page 36: Ir Out Control
(SECTION SEVEN: Customizing the Evolution 202 continued) (Input Trigger continued) The Evolution 202 does not respond to 12 V input trigger commands. NORMAL The Evolution 202 responds to 12 V input trigger commands. THEATER The Evolution 202 responds to 12 V input trigger commands, and the theater mode enabled input is selected automatically. -
Page 37: Link Control
Link Control (CAN Link) This function enables you to link and unlink CAN Link-enabled Krell products. The options are: LINKED, UNLINKED. Enter the menu, then: Use the level control knob on the preamplifier front panel or the up and down keys (14) on the remote control to select: LINK CONTROL. -
Page 38: Output Trigger
(SECTION SEVEN: Customizing the Evolution 202 continued) Output Trigger This function enables you to turn the two 12 Volt output triggers (25) on or off, or configure them with independent delays of up to 20 seconds. The options are: OFF, DELAY. Enter the menu, then: Use the level control knob on the preamplifier front panel or up and down keys (14) on the remote control to select:... -
Page 39: Rc-5 Control
RC-5 Control This function enables you to change the link transmit status of the Evolution 202. The options are: LINK TRANSMIT, LINK RECEIVE. Enter the menu, then: Use the level control knob on the preamplifier front panel or up and down keys (14) on the remote control to select: RC-5 CONTROL. -
Page 40: Rs-232 Control
(SECTION SEVEN: Customizing the Evolution 202 continued) RS-232 Control This function enables you to change the link transmit status of the Evolution 202. The options are LINK TRANSMIT, LINK RECEIVE. Enter the menu, then: Use the level control knob on the preamplifier channel front panel or up and down keys (14) on the remote control to select: RS-232 CONTROL. -
Page 41: 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 202 for home theater applications. Configuring an input for theater mode sets that input for unity gain and suspends the level control of the Evolution 202. Volume adjustments are then made through the preamp/processor connected to the input configured for theater mode on the Evolution 202. -
Page 42: Volume Display
(SECTION SEVEN: Customizing the Evolution 202 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 43: Troubleshooting System Noise
If the hum reappears with one or both interconnect cables reinserted, the cable needs to be replaced. If the interconnect cables are sound, you may be experiencing a ground loop. Please contact your authorized Krell dealer, distributor, or Krell for suggestions on how to eliminate the ground loop. -
Page 44: Warranty
The warranty for a Krell product is valid only in the country to which it was originally shipped, through the authorized Krell distributor for that country, and at the factory. - Page 45 Krell is not responsible for any damage incurred in transit. Krell will file claims for damages as necessary for a product damaged in transit to the factory. You are responsible for filing claims for shipping damages during the return shipment.
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Page 46: Return Authorization Procedure
Krell may, at its discretion, return a product in new packaging and bill the owner for such packaging if the product received by Krell was boxed in nonstandard packaging or if the original packaging was so damaged that it was unusable. -
Page 47: Specifications
Specifications Inputs Volume control 2 pr. CAST via 4-pin bayonet connectors Balanced, current-mode, 2 pr. balanced via XLR connectors 16-bit, discrete R-2R ladder 3 pr. single-ended via RCA connectors Input overload Tape input CAST: 14 mA RMS 1 pr. single-ended via RCA connector Balanced: 14 V RMS Single-ended: 7 V RMS Main outputs... - Page 48 E V O L U T I O N 2 0 2 S T E R E O 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 V 0 6 .