Page 2 - WARNINGS
Krell Industries, Inc.45 Connair RoadOrange, CT 06477-3650 USATEL 203-799-9954FAX 203-891-2028E-MAIL [email protected] http://www.krellonline.com This product complies with the EMC directive (89/336/EEC) and the low-voltagedirective (73/23/EEC). Do not place the preamplifier where it coul...
Page 3 - Contents; Page; AC Power Guidelines
Krell KAV–280p iii 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 ...
Page 4 - Illustrations; FIGURE 1 The KAV–280p Front Panel
iv Krell KAV–280p Illustrations FIGURE 1 The KAV–280p Front Panel 5 FIGURE 2 The KAV–280p Back Panel 8 FIGURE 3 The KAV–280p Remote Control 11 Page
Page 5 - Introduction; feature, the KAV–280p can easily adapt to
Krell KAV–280p 1 Introduction Thank you for your purchase of the Krell KAV–280p RemoteControl Preamplifier. The KAV-280p uses current mode and sur-face mount technologies derived directly from the state-of-the-artKrell KCT Preamplifier. The Class A direct-coupled design of the KAV–280p means thatthe...
Page 6 - Definition of Terms; OPERATION
Definition of Terms OPERATION Following are the definitions of key terms used in your owner’s ref-erence manual. Theater ThroughputTheater Throughput is a Krell configuration option that allows thesignal from a surround preamp/processor to pass through a Krellpreamplifier or integrated amplifier wit...
Page 7 - TECHNOLOGY; Unpacking
Definition of Terms, continued Krell Current ModeA proprietary Krell circuit topology in which the audio gain stagesof a component operate in the current rather than voltage domain.This unique technology provides the component with exceptionalspeed and a wide bandwidth. Surface Mount Technology (SMT...
Page 8 - Placement
4 Krell KAV–280p Placement Before you install the KAV–280p into your system, review the fol-lowing guidelines to choose the location for the KAV–280p. Thiswill facilitate a clean, trouble-free installation. The KAV–280p doesnot require any type of special rack or cabinet for installation. Forthe dim...
Page 9 - Figure 1 The KA
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 Level Knob 11 Front Panel Display Power 1 Power Button 2 Power LED 3S tand-by LED 4 Infrared Sensor Analog Devic...
Page 10 - Front Panel Description; POWER
6 Krell KAV–280p The front panel of the KAV–280p accesses power on and off, analog input selections, volume control, and mute. The front paneldisplay shows the volume and balance levels, and TheaterThroughput status. 1 Power ButtonUse this button to switch the KAV–280p between the stand-by andthe op...
Page 11 - MODE INDICATORS
Krell KAV–280p 7 Front Panel Description continued 8 Mute ButtonUse this button to interrupt the signal from the active source youhave selected. When the red mute LED (9) on the KAV–280p isilluminated, there is no signal output. To unmute the signal from the active source, press the mute but-ton aga...
Page 12 - Figure 2 The KA
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– 3 RC–5 IN KAV– 280p 12 13 14 16 17 18 20 19 21 15 Analog Inputs 12 Left and Right Balanced Analog Inputs 13 ...
Page 13 - Back Panel Description; ANALOG INPUTS
Back Panel Description See Figure 2 on page 8 Krell KAV–280p 9 The KAV–280p back panel provides connections for all inputs andoutputs, power on/off, and additional remote connections. 12 Left and Right Balanced Analog InputsThe KAV–280p is equipped with one pair of balanced (B-1) inputsvia XLR conne...
Page 15 - Figure 3 The KAV–280p Remote Control
Figure 3 The KAV–280p Remote Control Krell KAV–280p 11 22 23 25 24 26 27 28 Power22 Power Key23 Pre Key Analog Functions24 Analog Input Keys25 Tape Key Output ControlFunctions26 Mute Key27 Vol (Volume) Keys28 Bal (Balance) Keys Note The remote control keys listed above function with the KAV–280p. Ot...
Page 16 - Remote Control Description; See Figure 3 on page 11; Place the remote face down on the table.
Remote Control Description See Figure 3 on page 11 12 Krell KAV–280p The KAV–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. 2. Use your thumbnail o...
Page 17 - ANALOG FUNCTIONS
Remote Control Functions continued Krell KAV–280p 13 23 Pre KeyUse this key to activate the KAV–280p remote and access other pre-amplifier commands. You can then access preamplifier commandsuntil you press a different activation key, for example the CD key toaccess commands for a Krell compact disc ...
Page 18 - The front panel display indicates:
Remote Control Functions continued 14 Krell KAV–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 v...
Page 20 - 2 VDC REMOTE POWER IN / OUT
16 Krell KAV–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 facilitatescustom installations by allowing the KAV–280p to be controlled viahard-wired signals from various remote devices. 12 VDC REMOTE ...
Page 21 - Operating Your KAV–280p
Krell KAV–280p 17 This section provides information about operating the KAV–280p.The KAV–280p provides basic input selection and volume controloperation from the front panel. The remote control includes addi-tional preamplifier functions as well as CD transport and amplifiercontrols. See Remote Cont...
Page 23 - Configuring the KAV–280p for Theater Throughput
Krell KAV–280p 19 To simplify the integration of an audio/video surround soundprocessor into your system, set any input on the KAV–280p (S-1,S-2, S-3, or B-1) to operate as a unity gain stage. Krell calls thisconfiguration Theater Throughput. When you configure a KAV–280p input for Theater Throughpu...
Page 24 - one; How to Troubleshoot System Noise
20 Krell KAV–280p AC grounding becomes critical when connecting high performanceaudio components. When you mix and match audio components,each with its own ground potential, a low frequency hum mayoccur in one or both loudspeakers. This sometimes occurs whenintroducing a new component into a system....
Page 25 - Questions and Answers
Krell KAV–280p 21 Q. Should I leave my KAV–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 along time, you may disconnect the amplifier from AC powersupply. Q. When I turn on the amplifier there is a lo...
Page 26 - Warranty
22 Krell KAV–280p This Krell product has a limited warranty of five years for parts and labor on circuitry. Shouldthis product fail to perform at any time during the warranty, Krell will repair it at no cost to theowner, except as set forth in this warranty. The warranty does not apply to damage cau...
Page 27 - To contact the Krell Service Department:
Krell KAV–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. To expediteservice, you may wish to complete and e-mail the Servic...
Page 28 - Remote Control; Specifications
FREQUENCY RESPONSE 20 Hz-20 kHz +0 dB, -0.04 dB 0.2 Hz-300 kHz +0, -3 dB SIGNAL TO NOISE RATIO >98 dB “A” weighted >90 dB wideband TOTAL HARMONIC DISTORTION (THD) 20 Hz-20 kHz <0.004% GAIN 6.2 dB single-ended output 12.3 dB balanced output OUTPUT 9 Vrms single-ended output 18 Vrms balanced ...
