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Krell Industries EVOLUTION 222, Owner'S Reference Manual

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Krell Industries EVOLUTION 222 Owner'S Reference Manual Download Page 10

10

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.

(SECTION ONE: Definition of Terms continued)

Summary of Contents for EVOLUTION 222

Page 1: ...O W N E R S R E F E R E N C E EVOLUTION E V O L U T I O N 2 2 2 S T E R E O P R E A M P L I F I E R THE LEADER IN AUDIO ENGINEERING ...

Page 2: ...volution 222 preamplifier must be unobstructed at all times during operation Do not place flammable material above or beneath the preamplifier 12 Before making connections to the Evolution 222 preamplifier ensure that the power is off and other components are in mute or stand by mode Make sure all cable terminations are of the highest quality free from frayed ends short circuits or cold solder joi...

Page 3: ... the Evolution 222 SECTION FOUR Anatomy of the Evolution 222 page 15 Front Panel Description Remote Control Description Battery Installation and Back Panel Description SECTION FIVE Connecting the Evolution 222 to Your System page 26 Input and Output Connections Connection Steps SECTION SIX Evolution 222 Operation page 28 On Off and Stand by Operation SECTION SEVEN Customizing the Evolution 222 pag...

Page 4: ...4 List of Illustrations Figure 1 page 15 Evolution 222 Preamplifier Front Panel Figure 2 page 19 Evolution 222 Remote Control Figure 3 page 22 Evolution 222 Preamplifier Back Panel ...

Page 5: ...riously I realize that no matter how impressive an amplifi er s performance it can be no better than that of the preamplifier driving it My new Evolution 222 preamplifier employs balanced Krell Current Mode gain stages from input to output and Current Audio Signal Transmission CAST receivers and transmitters Utilizing these powerful technologies the Evolution 222 conveys the complete range of timb...

Page 6: ...alanced 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 the preamplifier Cascoded current mirror input and output stages utilize an LED voltage reference to achieve an exceptionally linear state of operation There are 310 transistors utilized in each channel and al...

Page 7: ...nter connects into an electrically linked whole The original signal remains unaltered from source to speaker CAST Basics 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 u...

Page 8: ...mponents that Krell manufactures An all metal body and locking connectors with gold contacts are part of the standard no compromise specification devel oped for every CAST cable made Evolution CAST By employing radical current mirror circuitry the Evolution 222 components ele vate the CAST technology to another level This advanced use of the technology increases the linearity transient speed and b...

Page 9: ...andwidth provided by Krell CAST and its circuitry update Evolution CAST yield accurate realistic music reproduction enabling connected compo nents to perform as if they are all part of a single circuit Single ended A two wire input or output circuit Single ended connections are not recommend ed for connections requiring long cable runs Use care when using single ended connections because the groun...

Page 10: ...rell 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 SECTION ONE Definition of Terms continued ...

Page 11: ...es 17 3 in 43 8 cm wide by 3 8 in 9 7 cm high by 18 3 in 46 4 cm deep and weighs 22 lbs 10 kg To Remove the Preamplifier from the Shipping Carton 1 Open the shipping carton and remove the top layer of foam The carton con tains these items 1 Preamplifier chassis 1 IEC Connector AC Power cord 1 Remote control 2 AAA size 1 5 Volt batteries for the remote 1 T 10 Torx wrench for the remote control 1 Ow...

Page 12: ...wide 3 8 in 9 7 cm high and 18 3 in 46 4 cm deep The Evolution 222 preamplifier requires at least two inches of clearance on each side and at least two inches of clearance above the component to provide ade quate ventilation Installation inside cabinetry may require additional ventilation AC Power Guidelines The Evolution 222 preamplifier has superb regulation and does not require a dedi cated AC ...

Page 13: ...from the preamplifier and all com ponents Separate the AC wires from any audio cables to prevent hum or other unwanted noise from being introduced into the system 2 Connect the outputs of your source equipment to the appropriate CAST 18 balanced 15 single ended 16 or tape inputs 17 on the Evolution 222 3 Connect the main outputs 20 on the Evolution 222 to your amplifier s inputs 4 Connect the supp...

Page 14: ...on 222 is now in the operational mode 2 With the preamplifier output muted or the volume fully attenuated select a source manually using the front panel input select buttons 8 9 or 10 or the remote input select keys Start playing the source Use the level control knob 14 or the remote level keys to set the volume to a comfortable level 3 To return the preamplifier to the stand by mode press the pow...

Page 15: ...D 2 Infrared Emitter 4 Infrared Sensor 3 Front Panel Display 5 Menu Button 6 Enter Button 8 Single ended Input Selection Buttons 9 Balanced Input Selection Buttons 10 CAST Input Selection Buttons 11 Tape Button and LED 12 Mute Button and LED 13 Phase Button and LED 14 Level Control Knob Power continued Input Selectors Display Level Navigate Customize Mute Phase Remote Functions ...

Page 16: ...e Evolution 222 is plugged into a standard AC wall receptacle It illuminates blue operational mode when the power button 1 is pressed while the Evolution 222 is in stand by mode Remote Functions on the Front Panel 2 Infrared Emitter The stand by Power LED 7 flashes when the Evolution 222 sends signals via this infrared emitter to a programmable remote control such as the Universal Krell Touch Scre...

Page 17: ...ponding 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 11 Tape Button and LED or Key Use this button or key to select the tape input that is connected to an analog tape source The red tape LED illuminates when the tape input is selected The front panel display 3 shows...

Page 18: ...s 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 222 See Customizing the Evolution 222 on page 29 SECTION FOUR Anatomy of an Evolution 222 continued ...

Page 19: ...ys 10 CAST Input Selection Keys 11 Tape Selection Key 12 Mute Key 13 Phase Key 14 Level Keys A Amp Pwr Key B Amp Sel Key C Bal ance Keys D Transport Keys E Menu Key F Direction Keys G Select Key H CD Key I DVD Key J Title Key Power Input Selectors Level Navigate Customize Mute Phase Balance CD and DVD Functions Amplifier Functions continued ...

Page 20: ...l the batteries 1 Remove the remote control backplate using the supplied T 10 Torx wrench 2 Install the batteries following the battery position diagram on the plastic battery receptacle 3 Replace and secure the backplate Notes Replace batteries when remote control function becomes intermittent Remove batteries if the remote control is not used for a long period of time Battery leakage can damage ...

Page 21: ...Forward and Back Keys Use these keys to select and begin playing the track that follows or precedes the current track Search Forward and Back Keys Press and hold these keys to scroll forward or backward through the current track E Menu Key Use this key to enter CD or DVD player menus F Direction Keys Use these keys to navigate CD and DVD menus G Select Key Use this keys to make selections from CD ...

Page 22: ...AST Inputs C 1 C 2 19 Tape Output 20 Main Outputs Single ended Main Output Balanced Main Output CAST Outputs 21 CAN Link In Out 22 RS 232 Port 23 RC 5 In 24 12 VDC In Out 25 Phono Power Port 26 IEC Power Cord Receptacle SECTION FOUR Anatomy of an Evolution 222 continued Inputs Outputs Remote Configurations Power Phono ...

Page 23: ...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 20 Main Outputs The Evolution 222 is equipped with one single ended output with RCA con nectors one balanced output with XLR connectors and two CAST...

Page 24: ...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 When the Evolution 222 is switched to operational mode and is connected to other components through the 12 V trigger it sends a signal that will switch other components allowing whole systems or parts of systems to be easily coordinated ...

Page 25: ...tor 25 Phono Power Port This port is used for connecting the preamplifier to a Krell KPE phono stage Power 26 IEC Power Cord Receptacle The IEC power connector is for use with the provided IEC standard 15 amp AC power cord ...

Page 26: ... CAST uses flexible interconnecting cables that can be drawn through tight spaces and concealed The Evolution 222 also offers balanced operation The circuitry and connections associated with balanced operation not only can minimize sonic loss but also are immune to induced noise especially for installations using long cables XLR Pin Configuration Pin 1 Ground Pin 2 Non inverting 0O Pin 3 Inverting...

Page 27: ...volution 222 3 Connect the appropriate main outputs 20 on the Evolution 222 to your ampli fier 4 Connect the supplied AC power cord to the IEC power cord receptacle 26 5 Plug the AC power cord into AC power The front panel display 3 scrolls through EVOLUTION 2 SOFTWARE VERSION and the red stand by LED illuminates 7 indicating that the Evolution 222 preamplifier is in stand by mode The scrolling st...

Page 28: ...ds INITIALIZING The front panel display shows the factory default input S 1 and level INF The Evolution 222 is now in the operational mode 2 With the preamplifier output muted or the volume fully attenuated select a source manually using the input select buttons or the remote keys 8 9 10 11 Start playing the source Use the level control knob or level keys 14 to set the volume to a comfortable list...

Page 29: ...ess the menu button on the preamplifier front panel or the menu key on the remote control Once you are in the menu you can press the menu button or key to exit the menu 14 Volume Knob or Level Keys Use the volume knob on the preamplifier front panel or the up and down keys on the remote control to scroll forward and backward through the menu hierarchy Each menu list is a continuous loop 6 Enter Bu...

Page 30: ... keys 14 on the remote control to select AC MAINS 2 Press the enter button on the preamplifier front panel or the enter key 6 on the remote control The front panel display 3 shows the default mode OFF 3 Use the level control knob or the up and down keys to select the desired option OFF or ON 4 Press the enter button or key to confirm the selection The front panel display reads AC MAINS OFF The Evo...

Page 31: ...e menu then 1 Use the level control knob on the preamplifier front panel or up and down keys 14 on the remote control to select INPUT BALANCE TRIM 2 Press the enter button on the preamplifier front panel or the enter key 6 on the remote control The front panel display 3 shows the default mode B 1 3 Use the level control knob or the up and down keys to select the desired input B 1 B 2 S 1 S 2 S 3 C...

Page 32: ...lect BRIGHTNESS 7 Press the enter button or key The front panel display shows the default mode HIGH 8 Use the level control knob or the up and down keys to select the desired brightness OFF LOW 25 MED 50 or HIGH 100 9 Press the enter button or key to confirm the selection The front panel display reads BRIGHTNESS ON The front panel display is always on TIMED The front panel display times out after ...

Page 33: ...ware version num ber 3 Rotate the level control knob clockwise or press the up key The front panel display shows the EEPROM version number 4 Rotate the level control knob clockwise or press the up key again The front panel display shows the PC board version number 5 Press the enter button or key Use the level control knob or the up and down keys to scroll through the version numbers of PC boards f...

Page 34: ...ntrol knob on the preamplifier front panel or up and down keys 14 on the remote control to select INPUT NAME 2 Press the enter button on the preamplifier front panel or the enter key 6 on the remote control The front panel display 3 shows the default mode B 1 3 Use the level control knob or the up and down keys to select the desired input B 1 B 2 S 1 S 2 S 3 C 1 C 2 or TAPE 4 Press the enter butto...

Page 35: ...NORMAL The phase of the selected input is unaffected INVERT The phase of the selected input is inverted 180 degrees Input Trigger This function enables you to configure the input trigger The options are OFF NORMAL THEATER Enter the menu then 1 Use the level control knob on the preamplifier front panel or the up and down keys on the remote control to select INPUT TRIGGER 2 Press the enter button on...

Page 36: ...the level control knob or the up and down keys to select the desired IR command from the list 4 Press the enter button or key to send the command out via the preamplifier front panel IR transmitter 2 The stand by LED 7 on the preamplifier flashes indicating that the command has been sent 5 Repeat Steps 2 4 for each of the commands you wish to transmit 6 Press the enter button or key to confirm the...

Page 37: ...een linked pre amplifier channels All other settings remain local UNLINKED When a preamplifier channel is unlinked it does not respond to commands from any other linked preamplifier channels After the preamplifier channel is unlinked settings can be changed independent of other preamplifier channels Mute This function enables you to control the mute mode Options are FULL 20 dB BACK Enter the menu ...

Page 38: ...lection The display reads DELAY 8 Use the level control knob or up and down keys to scroll to BACK 9 Press the enter button or key to return to TRIGGER 1 10 Use the level control knob or the up and down keys to scroll to TRIGGER 2 11 Repeat Steps 3 7 to set Trigger 2 ON The 12 Volt trigger output is enabled at power on for the selected trigger Trigger 1 or 2 OFF The 12 Volt trigger output is disab...

Page 39: ... front panel display reads RC 5 CONTROL Recall This function enables you to access factory default settings or your own saved settings The options are FACTORY SAVED Enter the menu then 1 Use the level control knob on the preamplifier channel front panel or up and down keys 14 on the remote control to select RECALL 2 Press the enter button on the preamplifier channel front panel or the enter key 6 ...

Page 40: ...les you to save a copy of the current settings The options are GO BACK Enter the menu then 1 Use the level control knob on the preamplifier front panel or up and down keys 14 on the remote control to select SAVE 2 Press the enter button on the preamplifier front panel or the enter key 6 on the remote control The front panel display 3 shows the default mode GO 3 Press the enter button or key to sav...

Page 41: ... shows the default input B 1 3 Use the level control knob or the up and down keys to select the desired input B 1 B 2 S 1 S 2 S 3 C 1 C 2 or TAPE 4 Press the enter button or key The front panel display shows the default mode OFF 5 Use the level control knob or the up or down keys to select ON or OFF 6 Press the enter button or key to confirm the selection and return to the select ed input ON The s...

Page 42: ...preamplifier front panel or the enter key 6 on the remote control The front panel display 3 shows the default mode dB 3 Use the level control knob or the up and down keys to select the desired option NUMERIC or dB 4 Press the enter button or key to confirm the selection The front panel display reads VOLUME DISPLAY SECTION SEVEN Customizing the Evolution 222 continued 5 Menu Button or Key Enter or ...

Page 43: ...struction 2 With the preamplifier off remove the interconnect cables then turn the pream plifier on If the hum disappears turn the preamplifier off and reinsert one of the interconnect cables Turn the preamplifier back on Repeat this process for each cable 3 If the hum reappears with one or both interconnect cables reinserted the cable needs to be replaced 4 If the interconnect cables are sound yo...

Page 44: ...nsible for notifying his or her Krell dealer distributor or Krell that a tube preamplifier will be used with the Full Power Balanced Series amplifiers so that the Krell dealer distributor or Krell can activate the coupling capacitors If the user does not notify the Krell dealer distributor or Krell and uses a tube preamplifier without the Full Power Balanced Series amplifier s coupling capacitor e...

Page 45: ...o Krell for exchange become the property of Krell No expressed or implied warranty is made for any Krell product damaged by acci dent abuse misuse natural or personal disaster or unauthorized modification Any unauthorized voltage conversion disassembly component replacement perforation of chassis updates or modifications performed to the product will void the warranty The operating voltage of the ...

Page 46: ...ents with the Service Department have been made in advance Proof of purchase will be required for warranty validation at the time of hand delivery IMPORTANT Use the original packaging to ensure the safe transit of the product to the factory dealer or distributor 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 ...

Page 47: ...ture connector Input impedance CAST 45 Ohms Balanced 95 k Ohms Single ended 47 5 k Ohms Output impedance CAST 1 M Ohms Balanced 50 Ohms Single ended 25 Ohms Gain 12 dB CAST or balanced output 6 dB single ended output Volume control Balanced current mode 16 bit discrete R 2R ladder Input overload CAST 14 mA RMS Balanced 14 V RMS Single ended 7 V RMS Output overload CAST 16 mA RMS Balanced 16 V RMS ...

Page 48: ... N C 4 5 C O N N A I R R O A D O R A N G E C T 0 6 4 7 7 3 6 5 0 U S A T E L 2 0 3 2 9 8 4 0 0 0 FA X 2 0 3 8 9 1 2 0 2 8 E M A I L s a l e s k r e l l o n l i n e c o m h t t p w w w k r e l l o n l i n e c o m E V O L U T I O N 2 2 2 S T E R E O P R E A M P L I F I E R ...

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