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KAV–280p
Remote Control
THE LEADER IN AUDIO ENGINEERING
Preamplifier
Instructions for Use
Owner’s Reference
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KAV–280p Remote Control Preamplifier Instructions for Use v 02.0 CONTACT Krell Industries, Inc. INFORMATION 45 Connair Road Orange, CT 06477-3650 USA TEL 203-799-9954 FAX 203-891-2028 E-MAIL krell@krellonline.com WEBSITE http://www.krellonline.com This product complies with the EMC directive (89/336/EEC) and the low-voltage directive (73/23/EEC). Do not place the preamplifier where it could be exposed to dripping or splashing. WARNINGS The ventilation grids on the top and bottom of the KAV–28
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Contents Page INTRODUCTION 1 DEFINITION OF TERMS 2 UNPACKING 3 PLACEMENT 4 AC Power Guidelines 4 FRONT PANEL DESCRIPTION 6 BACK PANEL DESCRIPTION 9 REMOTE CONTROL DESCRIPTION 12 Battery Installation and Removal 12 Remote Control Functions 12 CONNECTING THE KAV–280p TO YOUR SYSTEM 15 Connection Steps 15 OPERATING YOUR KAV–280p 16 Preamplifier Operation 16 Tape Input and Output 17 CONFIGURING THE KAV–280p FOR THEATER THROUGHPUT 19 HOW TO TROUBLESHOOT SYSTEM NOISE 20 QUESTIONS AND ANSWERS 21 WARRAN
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Illustrations Page FIGURE 1 The KAV–280p Front Panel 5 FIGURE 2 The KAV–280p Back Panel 8 FIGURE 3 The KAV–280p Remote Control 11 iv Krell KAV–280p
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Introduction Thank you for your purchase of the Krell KAV–280p Remote Control Preamplifier. The KAV-280p uses current mode and sur- face mount technologies derived directly from the state-of-the-art Krell KCT Preamplifier. The Class A direct-coupled design of the KAV–280p means that the signal path is fully balanced from input to output. This includes a fully balanced volume control. Circuits are powered by a dedicat- ed supply with discrete voltage regulators and there is a separate, dedicated
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Definition of Terms Following are the definitions of key terms used in your owner’s ref- erence manual. CONFIGURATIONS Theater Throughput Theater Throughput is a Krell configuration option that allows the signal from a surround preamp/processor to pass through a Krell preamplifier or integrated amplifier with no gain, for integrated vol- ume and balance management of Krell home theater systems. INPUT AND OUTPUT Balanced CONNECTIONS A symmetrical input or output circuit that has equal impedance
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Definition of Terms, continued Krell Current Mode TECHNOLOGY 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. Surface Mount Technology (SMT) SMT allows individual circuit elements to be placed very close together. This shortens signal paths and allows circuit elements to operate at the same temperature, resulting in more a
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Placement Before you install the KAV–280p into your system, review the fol- lowing guidelines to choose the location for the KAV–280p. This will facilitate a clean, trouble-free installation. The KAV–280p does not require any type of special rack or cabinet for installation. For the dimensions of the KAV–280p, see Specifications, on the back cover. Place the KAV–280p on a firm, level surface, away from excessive heat, humidity, or moisture. The KAV–280p is not hum-sensitive. Other components ma
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Figure 1 The KAV–280p Front Panel STAND-BY B–1 S–2 S–3 TAPE MUTE POWER S–1 KAV–280p 3 1 2 4 5 6 7 8 9 11 10 Power Mode Indicators 1 Power Button 8 Mute Button 2 Power LED 9 Mute LED 3Stand-by LED 4 Infrared Sensor Volume Adjustment Functions Analog Devices 10 Level Knob 5 S-1, S-2, S-3, and 11 Front Panel Display B-1 Buttons and LEDs 6Tape Button 7Tape LED
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Front Panel Description See Figure 1 on page 5 The front panel of the KAV–280p accesses power on and off, Front Panel analog input selections, volume control, and mute. The front panel Functions display shows the volume and balance levels, and Theater Throughput status. POWER 1 Power Button Use this button to switch the KAV–280p between the stand-by and the operational modes. 2 Power LED The blue power LED illuminates when the KAV–280p is in the operational mode. The power LED also flashes whe
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Front Panel Description continued MODE INDICATORS 8 Mute Button Use this button to interrupt the signal from the active source you have selected. When the red mute LED (9) on the KAV–280p is illuminated, there is no signal output. To unmute the signal from the active source, press the mute but- ton again. The red mute LED extinguishes. 9 Mute LED The red mute LED illuminates when you have interrupted the signal from the active source using the mute button (8) on the front panel or mute key (25)
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Figure 2 The KAV–280p Back Panel RC–5 50/60 Hz KAV–280p IN B–1 Preamplifier R L MAIN OUT R L OUT S–2 S–3 TAPE IN TAPE OUT MAIN OUT R L R L R L R L R L R L 12V IN NO USER SERVICEABLE PARTS INSIDE MADE IN USA 12 13 14 15 16 17 18 19 20 21 Analog Inputs Remote Connections 12 Left and Right Balanced 18 12 VDC Out and In Analog Inputs 19 RC-5 In 13 Left and Right Single-ended Analog Inputs Power 14 Left and Right Tape Inputs 20 Line Fuse and Fuseholder 21 IEC Connector Analog Outputs 15 Left and Rig
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Back Panel Description See Figure 2 on page 8 The KAV–280p back panel provides connections for all inputs and Back Panel outputs, power on/off, and additional remote connections. Functions ANALOG INPUTS 12 Left and Right Balanced Analog Inputs The KAV–280p is equipped with one pair of balanced (B-1) inputs via XLR connectors. 13 Left and Right Single-ended Analog Inputs The KAV–280p is equipped with three pairs of single-ended (S-1, S-2, or S-3) inputs via RCA connectors. 14 Left and Right Tape
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Back Panel Description, continued BACK PANEL REMOTE 17 12 VDC In CONNECTIONS, continued The KAV–280p is equipped with an input that receives 12 VDC (12 V trigger) power on/off signals from other Krell components and other devices that incorporate a 12 V trigger. This allows you to turn the KAV–280p on or off, or to and from stand-by, from other components. Notes The 12 VDC output current is limited to 30 ma. Consult the owner’s reference of the components used in a custom installation to take fu
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Figure 3 The KAV–280p Remote Control Power 22 Power Key 23 Pre Key 22 23 Analog Functions 25 24 Analog Input Keys 26 25 Tape Key Output Control Functions 27 24 26 Mute Key 27 Vol (Volume) Keys 28 Bal (Balance) Keys 28 Note The remote control keys listed above function with the KAV–280p. Other keys on this remote control may activate other Krell components, for exam- ple, other compact disc players. Consult the Krell owner’s reference manual for each component to review the remote control capabi
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Remote Control Description See Figure 3 on page 11 The KAV–280p remote control uses one CR2025 lithium battery, Battery which is included with the shipment. Installation and To open the battery compartment on the back of the remote control: Removal 1. Place the remote face down on the table. 2. Use your thumbnail or a small jeweler’s or eyeglass screw- driver to move the small switch toward the center of the remote, while using your index fingernail or screwdriver to pull down gently on the
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Remote Control Functions continued POWER, continued 23 Pre Key Use this key to activate the KAV–280p remote and access other pre- amplifier commands. You can then access preamplifier commands until you press a different activation key, for example the CD key to access commands for a Krell compact disc player. To return to the preamplifier commands, press the pre key again. You only need to press an activation key once. The remote “remembers” whether the pre key or the CD key has been pressed
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Remote Control Functions continued Analog Functions, To access and display balance, push either the “L” or the “R” bal- continued ance key on the remote. The front panel display indicates the bal- ance setting. After 3 seconds of inactivity or after a volume adjust- ment, the front panel display reverts to the volume setting. The front panel display indicates: – C – when the balance is centered. If the balance is not centered, the front panel display indicates balance right or left of cen
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Connecting the KAV–280p to Your System USING BALANCED Krell recommends using balanced interconnect cables. Balanced CONNECTIONS interconnect cables not only can minimize sonic loss but are also immune to induced noise, especially with installations using long cables. Balanced connections have 6 dB more gain than single- ended connections. When level matching is critical, keep this gain value in mind. Follow these steps to connect the KAV–280p to your system. Connection Steps 1. Make sure all po
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Connecting the KAV–280p to Your System continued Pin 1 Shield (ground) Pin assignments for the Pin 2 Non-inverting (hot) (0°) XLR connectors Pin 3 Inverting (cold) (180°) RC-5 IN Additional This input accepts baseband RC-5 input commands. It facilitates Connections custom installations by allowing the KAV–280p to be controlled via hard-wired signals from various remote devices. 12 VDC REMOTE POWER IN / OUT The input accepts 12 Volt power on/off signals from other Krell components and the outpu
