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EVOLUTION
EVOLUTION 222
STEREO PREAMPLIFIER
OWNER’S REFERENCE
THE LEADER IN AUDIO ENGINEERING
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Evolution 222 Stereo Preamplifier Owner’s Reference, v06.0 TEL 203-298-4000 Krell Industries, Inc. FAX 203-891-2028 45 Connair Road E-MAIL sales@krellonline.com Orange, CT 06477-3650 USA WEBSITE http://www.krellonline.com This product complies with the EMC directive (89/336/EEC) and the low-voltage directive (73/23/EEC). IMPORTANT SAFETY INSTRUCTIONS 1. Read Instructions. 2. Keep these Instructions. 3. Heed all Warnings. 4. Follow all Instructions. 5. Do not use this apparatus near water. 6.
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Contents List of Illustrations, page 4 A Letter from Dan D’Agostino, page 5 SECTION ONE: Evolution 222 Features and Technology, page 6 Features, Revolutionary Krell CAST Technology, Definition of Terms SECTION TWO: Unpacking and Placement, page 11 Opening the Evolution 222 Shipping Carton SECTION THREE: Quick Start, page 13 Connecting the Evolution 222 to Your System, Operating the Evolution 222 SECTION FOUR: Anatomy of the Evolution 222, page 15 Front Panel Description, Remote Control Descrip
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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 4
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A Letter from Dan D’Agostino Dear Audio Enthusiast, Thank you for your purchase of the Krell Evolution 222 preamplifier. The preamplifier plays a vital role in audio playback by mediating the line-level out- put of a wide variety of source components in preparation for the amplifier’s input. At no other point in the reproduction process is music so vulnerable to change, as the signal level is small, and susceptible to noise and distortion. Having always valued the role of the preamplifier in fin
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SECTION ONE Evolution 222 Features and Technology This section describes the innovative features and technology of the Evolution 222 preamplifier, and defines CAST and other key terms used in this reference. Features The Evolution 222 has an open loop bandwidth that exceeds 1 MHz and a balanced 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 preamplifi
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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. The Voltage Signal Transmission and the Traditional Audio System Traditionally, signal is transmitted in the vol
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(SECTION ONE: Evolution 222 Features and Technology continued) Krell Current Mode maintains the integrity of the signal within the component and 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
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Definition of Terms The following are definitions of key terms used in this owner’s reference: Inputs and Outputs Balanced A symmetrical input or output circuit that has equal impedance from both input terminals to a common ground reference point. The industry standard for profes- sional and sound recording installations, balanced connections have 6 dB more gain than single-ended connections and allow the use of long interconnect cables. Balanced connections are completely immune to induced no
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(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. 10
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SECTIONTWO Unpacking and Placement This section describes the procedures for safely unpacking and placing your Evolution 222 preamplifier. The Evolution 222 preamplifier and accessories are shipped in 1 carton. Opening the Evolution 222 Shipping Carton The Evolution 222 shipping carton measures 22.3 in. (56.6 cm) wide by 23.5 in. (59.7 cm) high by 16.2 in. (41.1 cm) deep. Preamplifier Chassis. This measures 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
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(SECTION TWO: Unpacking and Placement continued) Placement Before you install an Evolution 222 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 222 preamplifier does not require a special rack or cabinet for instal- lation. The preamplifier chassis measures 17.3 in. (43.8 cm) wide, 3.8 in. (9.7 cm) high, and 18.3 in. (46.4 cm) deep. The Evolution 222 pream
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SECTIONTHREE Quick Start To access the full array of available functions for the Evolution 222, please read this entire owner’s reference manual. The abbreviated routine in this Quick Start section will allow you to connect and operate the Evolution 222 quickly and enjoy its basic functions. The front and rear panels are shown in the diagrams on pages 15 and 22. Each button or feature is labeled with a callout number, and these numbers are shown in parentheses in the sections below. (In the fol
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(SECTION THREE: Quick Start) Operating the Evolution 222 After the Evolution 222 is connected to your system and to AC power, and the front panel display has stopped scrolling, begin operation: 1. Press the power button (1) on the front panel, or the remote control power key. The standby/power LED turns blue. The 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, s
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SECTION FOUR Anatomy of the Evolution 222 This section describes the Evolution 222 Preamplifier functions. Figure 1 Evolution 222 Front Panel Power 1 Power Button 7 Stand-by/Power LED 2 Infrared Emitter Remote Functions 4 Infrared Sensor Display 3 Front Panel Display Navigate/ 5 Menu Button Customize 6 Enter Button Input 8 Single-ended Input Selectors Selection Buttons 9 Balanced Input Selection Buttons 10 CAST Input Selection Buttons 11 Tape Button and LED Mute 12 Mute Button and LED Phase
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(SECTION FOUR: Anatomy of an Evolution 222 continued) Front Panel Description See Figure 1 on the previous page The Evolution 222 preamplifier front panel functions are described below: Chassis Preamplifier Chassis The preamplifier front panel provides power on, input and zone selection, level control, menu functions, and status display. Power 1 Power Button or Key Use this button or key to switch the Evolution 222 between the stand-by and operational modes. 7 Stand-by/Power LED The preamplifie
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Display 3 Front Panel Display The front panel display provides preamplifier channel status messages, includ- ing input status, tape output status, volume level, balance offset, and menu selections. Navigate/Customize 5 Menu Button or Key Use this button or key to access the menu functions of the Evolution 222. For more information, see Customizing the Evolution 222, on page 29. 6 Enter Button or Key Use this button or key to configure the menu functions of the Evolution 222. For more information
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(SECTION FOUR: Anatomy of an Evolution 222 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 222. See Customizing the Evolution 222, on page 29. 18
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Figure 2 Evolution 222 Remote Control Power 1 Power Key Navigate/ 5 Menu Key Customize 6 Enter Key Input 8 Single-ended Input Selectors Selection Keys 9 Balanced Input Selection Keys 10 CAST Input Selection Keys 11 Tape Selection Key Mute 12 Mute Key Phase 13 Phase Key Level 14 Level Keys Amplifier A Amp Pwr Key Functions B Amp Sel Key Balance C Bal(ance) Keys CD and DVD D Transport Keys Functions E Menu Key F Direction Keys G Select Key H CD Key I DVD Key J Title Key continued 19
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(SECTION FOUR: Anatomy of an Evolution 222 continued) Remote Control Description See Figure 2 on the previous page The Evolution 222 remote provides the same power, preamplifier, level control, and navigate/customize functions as the preamplifier’s front panel. In addition, the remote has CD and DVD functions, and menu configuration functions. Keys Labled 1 to 14 These remote keys have the same function (and callout number) as the corre- sponding front panel controls described in the preceding
