Krell Industries Evolution Owner'S Reference Manual Download Page 4 | Manualshive

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List of Illustrations

Figure 1, page 15

Evolution One Amplifier and

Power Supply Chassis Front Panels

Inset Evolution One Amplifier Channel: Front Panel View

Figure 2, page 16

Evolution One Amplifier and

Power Supply Chassis Back Panels

Figure 3, page 17

Evolution One Amplifier Chassis Top

Figure 4, page 18

Evolution One Power Supply Chassis Top

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Summary of Contents for Evolution

Page 1: ...O W N E R S R E F E R E N C E E V O L U T I O N O N E M O N A U R A L P O W E R A M P L I F I E R EVOLUTION ...

Page 2: ...mployed with an Evolution One Monaural Power Amplifier requires special attention when connecting speakers Do not connect the negative speaker terminals together Do not connect the negative speaker terminals to ground Do not connect an Evolution One Monaural Power Amplifier to a loudspeaker selector device that employs a common ground scheme as it may short circuit the amplifier output THERE ARE N...

Page 3: ...Anatomy of an Amplifier page 15 Features and Benefits of the Evolution One Design SECTION FOUR Connecting an Evolution One Amplifier to Your System page 19 CAST and Voltage Connections Connection Steps DC Protection Circuitry and Remote Control Options SECTION FIVE Amplifier Operation page 22 Powering Up Adjusting Power Meter Modes Switching between CAST and Voltage Connections Amplifier Care SECT...

Page 4: ...wer Supply Chassis Front Panels Inset Evolution One Amplifier Channel Front Panel View Figure 2 page 16 Evolution One Amplifier and Power Supply Chassis Back Panels Figure 3 page 17 Evolution One Amplifier Chassis Top Figure 4 page 18 Evolution One Power Supply Chassis Top ...

Page 5: ... best without regard to impedance or efficiency The Evolution One amplifier joins this awesome current capability with a new ultra linear circuit topology It is a strong belief of mine that linearity an amplifier s ability to output an exact dupli cate of the input signal is the ultimate measure of that amplifiers worth I drive Krell amplifier designs toward the common goal of linearity through th...

Page 6: ...ution 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 I encourage you to audition it as soon as it is released Sincerely Daniel D Agostino Chief Executive Officer 2 A Letter from Dan D Agostino continued ...

Page 7: ...ry is replete with product introductions that have deeply impacted the high end audio industry The most discriminating audiophiles and product reviewers have consistently recognized Krell components for standard setting performance The Evolution One amplifier brings Krell design to a new level setting a standard for performance that will not soon be matched The shear breadth of this amplifier s dy...

Page 8: ...r design and performance remains at the core of the company s achievements Every Krell component upholds the legacy incorporating unique technologies that are the direct result of Dan s discoveries in audio amplification The Evolution One amplifiers build on the Krell legacy They provide unprecedent ed linearity with the control and accuracy that only comes from superior current capability The sou...

Page 9: ...ly linked whole The original signal remains unaltered from source to speaker CAST Basics Here s 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 loud ...

Page 10: ...omponents 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 components elevate the CAST technology to another level This advanced use of the technology increases the linearity transient speed and bandw...

Page 11: ...nt domain using propri etary multiple output current mirrors with extraordinary open loop linearity The current mirrors in the final gain stages use 36 pairs of high voltage high speed transistors Originally developed for demanding high bandwidth video circuits these transistors help yield gain stages with superb accuracy and very low dis tortion The signal path is fully complementary and fully ba...

Page 12: ... conditions The high current regulators powering the amplifier output stages use fully complementary gain stages and output drivers The resulting wide bandwidth and low output imped ance of the Evolution One surpasses even the stringent demands of the amplifier output stages The driver and output stages in the high current regulators use 14 pairs of the same robust high performance power transisto...

Page 13: ...uts exceeds a safe level the microprocessor control automatically switches in DC blocking capacitors to prevent damage to the input stages or the loudspeakers The microprocessor control measures the load impedance in real time to optimize the performance of the amplifier and power supply or in the case of a short circuit to shut the amplifier off It monitors the regulator output voltages the symme...

Page 14: ...analog components transmitting the audio waveform between components in the current domain rather than in the voltage domain The speed and bandwidth provided by Krell CAST and its circuitry update Evolution CAST yield accurate realistic music reproduction enabling connected components to perform as if they are all part of a single circuit Operation Off When the power breaker switch on the back pan...

Page 15: ...ich 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 Evolution Bias A patented microprocessor control system that maintains Class A bias operation regardless of musical demand Class A bias is the most accurate method used to amplify musical signals Evolution Bias maximize...

Page 16: ...y chassis is 110 lbs 49 8 kg Each power supply chassis measures 15 8 in 40 cm wide by 6 4 in 16 1 cm high by 20 5 in 52 2 cm deep and weighs 95 lbs 43 kg Amplifier Chassis The combined weight of the shipping carton and the amplifier chassis is 70 lbs 31 7 kg Each amplifier chassis measures 15 8 in 40 cm wide by 6 2 in 15 8 cm high by 21 5 in 54 7 cm deep and weighs 55 lbs 24 9 kg To Remove the Cha...

Page 17: ...rtain the amplifier chassis feet 13 and the amplifier power connector not shown align with the 4 power supply locating pins and power supply power connector as you lower the amplifier chassis onto the power supply chassis Use the outer edges of the amplifier and power supply chassis as a guide The dimensions of the chassis are identical When viewed from the top the power supply chassis will disapp...

Page 18: ... place the amplifier in a closed cabinet you may need to modify shelf spacing or use small fans to increase ventilation Place the amplifier as close to the loudspeakers as possible Although Krell CAST technology permits you to use interconnect cables of any length try to keep the cable length to a minimum All Evolution One amplifiers drive the lowest imped ances with ease When impedance is added d...

Page 19: ...r Chassis 2 Power Supply Chassis 3 Power Stand by Button 4 Power Stand by LED 5 Backlight 6 Power Meter Scale 7 Power Meter Wand 8 CAST LED 9 50 W Scale LED 10 5000 W Scale LED 11 Cast Balanced Button 12 Meter Range Button 13 Amplifier Feet 14 Power Supply Feet POWER CAST 5000W 50W Inset Evolution One Amplifier Channel Front Panel View 1 6 7 8 4 3 2 4 9 10 11 12 13 14 5 continued ...

Page 20: ...er Breaker Switch IN IN OUT MADE IN USA NO USER SERVICEABLE PARTS INSIDE KRELL INDUSTRIES INC 45 CONNAIR ROAD ORANGE CT 06477 3650 USA EVOLUTION ONE EVOLUTION ONE BALANCED INPUT CAST INPUT MADE IN USA NO USER SERVICEABLE PARTS INSIDE KRELL INDUSTRIES INC 45 CONNAIR ROAD ORANGE CT 06477 3650 USA EVOLUTION ONE EVOLUTION ONE 50 60 Hz 19 20 21 16 15 17 18 1 2 SECTION THREE Anatomy of an Amplifier cont...

Page 21: ...17 Figure 3 Evolution One Amplifier Chassis Top 17 Amplifier Binding Posts 22 Amplifier Front 17 22 continued ...

Page 22: ...18 SECTION THREE Anatomy of an Amplifier continued Figure 4 Evolution One Power Supply Chassis Top 23 Locating Pin 24 Power Connector 25 Power Supply Front 23 24 23 25 ...

Page 23: ...s Krell CAST uses flexible interconnecting cables that can be drawn through tight spaces and concealed Balanced Connections Evolution One amplifiers also offer balanced connections Balanced connections not only can minimize sonic loss but also are immune to induced noise especially for installations using long cables Cable Connection Steps The following steps describe how to connect cables to an E...

Page 24: ... of the power supply chassis 6 Turn to Amplifier Operation on page 22 Note If a CAST and balanced source are connected to the amplifier during the initial installa tion the Evolution One amplifier defaults to CAST when it is powered on If only one source is connected the amplifier will automatically select that source For more informa tion see Switching Between CAST and Balanced Inputs on page 23 ...

Page 25: ... operational modes and to switch between CAST and bal anced inputs The RC 5 remote control is used with a third party remote control system that provides RC5 IR data with the carrier intact via a wired connection A stereo tip ring sleeve 1 8 mini connector is used in the following configura tion Tip RC 5 data Ring 5 V Sleeve GND 12 Volt Trigger The Evolution One amplifier has a 12 Volt trigger inp...

Page 26: ...ean power Evolution One amplifiers can safely drive speakers to higher sound pressure levels than other amplifiers Always lower the volume level at the first sign of loudspeaker distress Powering On Powering Down and Powering Off When powering on any system turn on amplifiers last When powering down turn off amplifiers first Krell recommends leaving the Evolution One amplifier pow ered down in the...

Page 27: ...he amplifier in stand by mode press the power button 3 on the front panel It is now safe to turn off the rest of the system Switching Between CAST and Balanced Inputs If a CAST and balanced source are connected during the initial installation see Cable Connection Steps pages 19 20 the Evolution One defaults to CAST and the CAST LED illuminates in blue when the amplifier is powered on If only one s...

Page 28: ...mote Power Meter Range and Power Meter Wand Action The power meter 6 7 enables you to monitor the power output of the Evolution One amplifier The 500 Watt scale is the factory default The 50 Watt scale range is the most sensitive and displays the smallest changes in power output with the greatest physical movement of the power meter wand 7 Conversely the 5000 Watt scale is the least sensitive and ...

Page 29: ...amplifiers are on Use care when listening at high volume levels Because of their tremendous reserve of clean power Evolution One amplifiers can drive loudspeakers to much higher sound pressure levels than other amplifiers without clipping Always lower the volume level at the first sign of loudspeaker distress Exercise great care when handling an amplifier especially at the back panel Rings necklac...

Page 30: ...he amplifier This circuitry constantly evaluates the operation of the amplifiers and provides protection against potentially damaging DC input or output and short circuits Regulator operation is also continuously monitored to ensure constant voltage to the output stage These protective systems are designed to prevent damage to Evolution One amplifiers or loudspeakers caused by other defective comp...

Page 31: ...The amplifier is set for authorized Krell reverts to stand by mode 60 Hz but is attempt dealer or distributor ing to operate via a 50Hz system Output mutes while music DC detected at input Check source and is playing and then sound during playback preamplifier for resumes Input capacitors are excessive DC output automatically engaged Once DC has been elimi nated cycle the power breaker switch 21 t...

Page 32: ...anty period must be presented to obtain warranty service The warranty begins on the date of the original retail purchase as noted on the bill of sale or receipted invoice from an authorized Krell dealer or distribu tor Previously owned equipment when re purchased from an authorized Krell dealer or distributor has the balance of the original warranty based on the origi nal date of manufacture The w...

Page 33: ...ll product damaged by accident 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 unit will void the warranty In the event that Krell receives a product for warranty service that has been modified in any way without Krell authorization all warra...

Page 34: ... 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 boxe...

Page 35: ...ak 60 V RMS Output current 57 A peak Slew rate 100 V us Power consumption Standby 225 W Idle 300 W Maximum 3600 W 31 Inputs 1 balanced via XLR connector 1 CAST via 4 pin bayonet connector Outputs 1 pair Krell binding posts Dimensions Amplifier chassis 15 8 in W x 6 2 in H x 21 5 in D 40 cm W x 15 8 cm H x 54 7 cm D Power supply chassis 15 8 in W x 6 4 in H x 20 5 in D 40 cm W x 16 1 cm H x 52 2 cm...

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