Krell Industries KRC-3 Kurzanleitung

KRC-3

REMOTE CONTROL LINE-LEVEL

PREAMPLIFIER

OWNER’S REFERENCE

TABLE OF CONTENTS

INTRODUCTION

UNPACKING AND ASSEMBLY

BASIC INSTALLATION

INPUT/OUTPUT CONNECTIONS

BASIC PREAMPLIFIER OPERATION

OPTIONAL CONFIGURATIONS

REMOTE CONTROL

REAR PANEL DESCRIPTION

QUESTIONS AND ANSWERS

SPECIFICATIONS

WARRANTYAND SERVICE

INTRODUCTION

Thank you for your purchase of the KRELL KRC-3 remote control

preamplifier. KRELLhas built a reputation for blazing the evolutionary path in

audio technology. Our new KRC-3 continues this tradition by mating the

essential KRELLtechnologies of Class A operation and discrete circuitry with

current mode amplification and our High Resolution volume control.

First developed for our Reference 64 D/A processor, current mode amplification

utilizes gain stages that operate exclusively in the current domain. This

inherently linear and ultra-fast circuit topology effortlessly captures the most

extreme transients while preserving all the nuances and subtleties of the

musical performance.

The KRC-3uses our new High Resolution sixteen bit system to resolve line level

attenuation. This control selects from over 300 discrete resistor network

combinations to provide a perfectly proportioned and highly precise attenuation

curve. This system allows for a fine vernier of adjustment and the creation of a

custom logarithmic level taper perfectly suited for audio. KRELL-written

control software inserts only the appropriate individual resistor values into the

signal path rather than subjecting the musical signal to the sonic degradations

inherent in a conventional resistive potentiometer. This translates into

resolving power that delivers an even quieter, or "blacker", background to all

forms of music, allowing more of the natural textures of the music to be

brought forth.

To obtain the best performance from your KRC-3, careful attention should be

paid to its placement, installation, and operation. A thorough understanding of

these details will help insure satisfactory operation and a long life for the

KRC-3 and related system components.

This Owner’s Reference is divided into several sections, each designed to

perform a different function. As you read through the Owner’s Reference you

will become better acquainted with the features and functions that make the

KRC-3 an outstanding performer and a superb value. A Question and Answer

section is included where answers to commonquestions are provided. Should

you have any questions or suggestions please feel free to contact your

authorized dealer or the KRELLstaff for assistance.

In the unlikely event that your KRC-3 should require service, you will be

pleased to know that it is backed by a comprehensive Customer Satisfaction

policy and one of the most advanced service facilities in the industry. For

detailed information on the terms and conditions of service, please consult your

warranty registration card, your KRELLDealer or Distributor.

UNPACKING AND ASSEMBLY

1. After opening the box and removing the top layer of foam, the KRC-3and the

following items will nowbe visible:

1 KRC-3 remote control

1 T- 10 Torx wrench

1 AC power cord

1 Owner’s Reference

1 Warranty card

NOTE: If any of these items are not included please contact your authorized

dealer immediately for assistance.

NOTE:Save all packing materials. If you must ship your KRC-3 in the future,

repack the unit in its original packing to prevent damagein transit.

BASIC INSTALLATION

1. Place the unit on a firm level surface free from excessive dirt or moisture.

The KRC-3is not particularly hum sensitive, therefore other components can

be placed on or around the KRC-3.

NOTE: While the KRC-3 has a superb power supply and does not require a

dedicated circuit, we strongly advise against any connections through extension

cords or multiple AC adapters. High quality 15 amp line conditioners or

grounded ACstrips are acceptable.

INPUT AND OUTPUT CONNECTIONS

CAUTIONS:When making connections to this or any other component, make sure

all components are OFF. Make sure all cable terminations are of the highest

quality, free from frayed ends, shorts, or cold solder joints.

1. Connect the left and right outputs of your source components to the input

on the KRC-3.

The KRC-3 is equipped with four single-ended inputs (S1, $2, S3/proc, and

S4/tape) and one balanced input (B1). The S1 and $2 inputs are standard

single-ended inputs while S3/proc and S4/tape have user-configurable

options. The S3/proc and S4/tape are set as standard inputs from the

factory. The S3/proc input can be set for use as a surround processor

throughput and the S4/tape can be set as a tape monitor input. Both

options will be discussed on page 6 in Optional Configurations.

2. Connect the output of the KRC-3 to the input of your power amplifier.

The KRC-3 has balanced outputs via XLR type connectors and single-ended

outputs via RCAtype connectors. Both outputs are active at all times,

allowing simultaneous connection to separate amplifiers. Only one of these

outputs should be connected to a single stereo amplifier.

NOTE: When connecting inputs or outputs to the KRC-3, remember that the

balanced connections will have 6dB more gain than the single-ended

connections. When level matching is critical in your installation, keep this

specification in mind.

3. Plug the ACcord into the receptacle on the back of the KRC-3. Plug the

remaining end into the AC wall receptacle. The blue pilot LED will

illuminate, and the KRC-3will be ready for operation.

BASIC PREAMPLIFIER OPERATION

The KRC-3provides basic input selection and volume control operation from

the front panel. The remote control includes additional preamplifier functions

as well as KRELLCDtransport and amplifier controls (see Remote Control page

8 for more information).

NOTES ON THE VOLUME CONTROL

The level control on the KRC-3 is quite unique in that the volume level is

indicated by illuminated LEDs around the outside of the level control, not by

the physical position of the level control. When you change level with the

remote control, the position of the level control knob does not change. This is

because the volume is electronically regulated without the use of a

potentiometer. When volume is increased manually or by remote control, the

indicator LED will illuminate clockwise. When volume is decreased, the

indicator LEDwill illuminate counterclockwise. Whenthe level is fully off, no

indicator LEDswill be illuminated.

BASIC OPERATION

I. Turn the volume control fully counterclockwise to the off position, no LEDs

illuminated.

2. Turn on the power amplifier.

3. Choose a listening source and select that input either manually or via the

remote control.

4. Start play of the source.

5. Set volume to a comfortable listening level.

6. Whenchanging sources, lower volume to the off position. This insures that

the next source played will not damage your system with a high output

transient.

BASIC PREAMPLIFIER OPERATION

MUTE

Front panel: To mute, press the active source’s input button.

Remote control: Press the mute button.

Front panel: To unmute the KRC-3, press the active source’s input button

again. If the source is changed while the KRC-3 is muted, press the new

source’s input button a second time to unmute the KRC-3.

Remote control: Press the mute button.

OPTIONAL CONFIGURATIONS

S3/proc: For simplified integration of an A/V surround sound processor, the

S3/proc input can be set to operate as a unity gain stage. In this mode, when

the S3/proc input is selected, the KRC-3’s volume control and balance is

disabled. Volume control is transferred from the KRC-3 to the A/V surround

processor connected to the S3/proc input. The left and right channel volume

settings are now independent of the KRC-3’s volume control and the overall

system level is determined by the A/V surround processor exclusively.

S4/tape: The S4/tape input is set to operate as a tape monitor. A tape monitor

allows you to listen to the output from your recorder and enables you to

examine your recording for imperfections or distortions. After selecting a

source for recording (B1, S1, $2, or $3), repeated pressing of the S4/Tape

button will toggle between the tape recorder output (LED illuminated) and the

input source (LEDnot illuminated).

If your system does not include a tape recorder, the S4/Tape input can be

configured for operation as a standard input identical to the S 1 and $2 inputs.

NOTE: The factory default positions sets S3/Proc as a standard input and

S4/Tape as a tape monitor input.

OPTIONAL CONFIGURATIONS

To enable these options, it is necessary to remove the top cover of the KRC-3.

1. Unplug the KRC-3 from the ACoutlet.

2. Remove the KRC-3 top cover screws with the supplied T-10 Torx wrench.

Lift the cover from the KRC-3.

3. Find the two switches located toward the front of the board that are labeled

S3/proc and S4/tape. Set the dip switches to the position appropriate for

your application.

4, Place the top cover back on the KRC-3and insert the cover screws.

5. Plug the KRC-3back into the ACoutlet.

REMOTE CONTROL

NOTE:When a function button on the remote control is pressed, the blue pilot LED

will flash on the KRC-3. Whenthe button is released the flashing stops.

PREAMPLIFIER FUNCTIONS

LEVEL/~ Raises volume

LEVEL ~ Lowers volume

B-1

S-I

S-2

S-3

S-4

TAPE

Selects B- 1 input

Selects S- 1 input

Selects S-2 input

Selects S-3/Proc input

Selects S-4/Tape when input is configured as a standard input

Selects S-4/Tape when input is configured as a tape monitor

PHASE

MUTE

BALANCE L

BALANCE R

0 or 180°, LEDilluminates when phase is reversed 180

°.

No signal output when LEDis illuminated.

Shifts balance to the left in l dB increments.

mutes the right channel.

Shifts balance to the right in l dB increments.

mutes the left channel.

"L" position

"R" position

CD FUNCTIONS

PLAY

PAUSE

TRACK PREV

TRACK NEXT

Starts CD playback on KRELLCD transports.

Temporarily suspends playback of current track. Second

press of the Pause button resumes play.

Selects and begins playing the track previous to the current

track.

Selects and begins playing the track after the current track.

AMPLIFIER FUNCTIONS

Turns KRELLAudio Standard or S-Series amplifiers On or Off.

MTR Turns KRELLS-Series amplifiers bias level meters On or

Off and cycles through KRELL Audio Standard meter

functions.

NOTE:The B2 and GAIN buttons are not functional with the KRC-3.

BATTERY INSTALLATION

NOTE: Batteries (AAA) should be replaced when the KRC-3 does not readily

respond to remote commands.

1. Removethe four torx screws from the remote control’s back plate.

2. Remove the back plate to expose the battery storage compartment.

3. Insert batteries (refer to the polarity drawing while inserting batteries.)

4. Replace the back plate and insert the four torx screws.

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