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Instructions for Use Owner ’ s Reference THE LEADER IN AUDIO ENGINEERING KA V– 280p Remote Control Preamplifier.
Krell Industries, Inc. 45 Connair Road Orange, CT 06477-3650 USA TEL 203-799-9954 F AX 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).
Krell KA V–280p iii Contents Page INTRODUCTION 1 DEFINITION OF TERMS 2 UNP ACKING 3 PLACEMENT 4 AC Power Guidelines 4 FRONT P ANEL DESCRIPTION 6 BACK P ANEL DESCRIPTION 9 REMOTE CONTROL DESCRIPTION .
iv Krell KA V–280p Illustrations FIGURE 1 The KA V–280p Front Panel 5 FIGURE 2 The KA V–280p Back Panel 8 FIGURE 3 The KA V–280p Remote Control 1 1 Page.
Krell KA V–280p 1 Introduction Thank you for your purchase of the Krell KA V–280p Remote Control Preamplifier . The KA V -280p uses current mode and sur- face mount technologies derived directly from the state-of-the-art Krell KCT Preamplifier .
Definition of T erms OPERA TION Following are the definitions of key terms used in your owner ’s ref- erence manual. Theater Throughput Theater Throughput is a Krell configuration option that allows.
Definition of T erms, continued 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.
4 Krell KA V–280p Placement Before you install the KA V–280p into your system, review the fol- lowing guidelines to choose the location for the KA V–280p. This will facilitate a clean, trouble-free installation. The KA V–280p does not require any type of special rack or cabinet for installation.
Figure 1 The KA V–280p Front Panel MUTE TAPE POWER STAND-BY KA V–280p 3 1 2 4 5 B– 1 S– 1 S– 2 S– 3 7 11 6 9 10 8 Mode Indicators 8 Mute Button 9 Mute LED V olume Adjustment Functions 10 L.
6 Krell KA V–280p The front panel of the KA V–280p accesses power on and off, analog input selections, volume control, and mute. The front panel display shows the volume and balance levels, and Theater Throughput status. 1 Power Button Use this button to switch the KA V–280p between the stand-by and the operational modes.
Krell KA V–280p 7 Front Panel Description continued 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 KA V–280p is illuminated, there is no signal output. To unmute the signal from the active source, press the mute but- ton again.
Figure 2 The KA V–280p Back Panel 50/60 Hz OUT R MAIN OUT MAIN OUT L L R L R L Preamplifier TAPE OUT R L R L TAPE IN R L R L R MADE IN USA IN 12V NO USER SERVICEABLE PARTS INSIDE B– 1 S– 2 S– .
Back Panel Description See Figure 2 on page 8 Krell KA V–280p 9 The KA V–280p back panel provides connections for all inputs and outputs, power on/off, and additional remote connections. 12 Left and Right Balanced Analog Inputs The KA V–280p is equipped with one pair of balanced (B-1) inputs via XLR connectors.
Back Panel Description, continued 10 Krell KA V–280p 17 12 VDC In The KA V–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 KA V–280p on or off, or to and from stand-by , from other components.
Figure 3 The KA V–280p Remote Control Krell KA V–280p 11 22 23 25 24 26 27 28 Power 22 Power Key 23 Pre Key Analog Functions 24 Analog Input Keys 25 T ape Key Output Control Functions 26 Mute Key 27 V ol (V olume) Keys 28 Bal (Balance) Keys Note The remote control keys listed above function with the KA V–280p.
Remote Control Description See Figure 3 on page 1 1 12 Krell KA V–280p The KA V–280p remote control uses one CR2025 lithium battery , which is included with the shipment. To open the battery compartment on the back of the remote control: 1. Place the remote face down on the table.
Remote Control Functions continued Krell KA V–280p 13 23 Pre Key Use this key to activate the KA V–280p remote and access other pre- amplifier commands. Y ou 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 .
Remote Control Functions continued 14 Krell KA V–280p To access and display balance, push either the “L” or the “R” bal- 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.
Krell KA V–280p 15 Krell recommends using balanced interconnect cables. Balanced 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.
16 Krell KA V–280p Pin 1 Shield (ground) Pin 2 Non-inverting (hot) (0°) Pin 3 Inverting (cold) (180°) RC-5 IN This input accepts baseband RC-5 input commands. It facilitates custom installations by allowing the KA V–280p to be controlled via hard-wired signals from various remote devices.
Krell KA V–280p 17 This section provides information about operating the KA V–280p. The KA V–280p provides basic input selection and volume control operation from the front panel. The remote control includes addi- tional preamplifier functions as well as CD transport and amplifier controls.
18 Krell KA V–280p The KA V–280cd has a discrete tape input and output. The tape output is used to send an input signal from S-1, S-2, S-3, or B-1 to a recording device or processor . Y ou can use the tape feature in three ways: 1. Use this button to playback pre-recorded tapes.
Krell KA V–280p 19 To simplify the integration of an audio/video surround sound processor into your system, set any input on the KA V–280p (S-1, S-2, S-3, or B-1) to operate as a unity gain stage. Krell calls this configuration Theater Throughput.
20 Krell KA V–280p AC grounding becomes critical when connecting high performance audio components. When you mix and match audio components, each with its own ground potential, a low frequency hum may occur in one or both loudspeakers. This sometimes occurs when introducing a new component into a system.
Krell KA V–280p 21 Q. Should I leave my KA V–280p on all the time? A. Krell recommends leaving the amplifier in the stand-by mode, ready to play music. If you are not going to play music for a long time, you may disconnect the amplifier from AC power supply .
22 Krell KA V–280p This Krell product has a limited warranty of five years for parts and labor on circuitry . Should this product fail to perform at any time during the warranty , Krell will repair it at no cost to the owner , except as set forth in this warranty .
Krell KA V–280p 23 Return Authorization Procedure If you believe there is a problem with your component, please con- tact your dealer , distributor , or the Krell factory to discuss the problem before you return the component for repair .
FREQUENCY RESPONSE 20 Hz-20 kHz +0 dB, -0.04 dB 0.2 Hz-300 kHz +0, -3 dB SIGNAL TO NOISE RA TIO >98 dB “A” weighted >90 dB wideband TO TA L HARMONIC DISTORTION (THD) 20 Hz-20 kHz <0.
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