Krell Illusion II Preamplifier User Manual download pdf

Illusion II

Stereo Preamplifier

SETUP GUIDE

Getting Started

Thank you for your purchase of the Krell Illusion II Stereo Preamplifier. The Illusion II

features Krell Current Mode circuit topologies, balanced technology, and a robust

power supply for exceptional audio performance. The Illusion II preamplifier includes

a digital input module and a headphone output. A thoughtful suite of menu options

ensures that the Illusion II can be customized for the greatest ease of operation.

The preamplifier’s front panel provides power, input selection, level control, menu

functions, and status display. The rear panel allows connection to audio sources,

power amplifiers, AC power, and other system components.

The remote control provides power, preamplifier, level control, navigation and

customization functions, CD and DVD player controls and menu configuration.

Do not place the preamplifier where it could be exposed to dripping or splashing.

Do not remove or bypass the ground pin on the end of the AC cord. This may cause radio

frequency interference (RFI) to be introduced into your playback system.

The ventilation slots on the top and bottom of the preamplifier must be unobstructed at all times

during operation. Do not place flammable material on top of or beneath the component.

Turn off all systems’ power before connecting the preamplifier to any component.

Make sure all cable terminations are of the highest quality, free from frayed ends, short circuits,

or cold solder joints.

THERE ARE NO USER-SERVICEABLE PARTS INSIDE ANY KRELL PRODUCT

1. Open the shipping box and remove the top layer of foam. You will see these

items:

2. Carefully remove all items from the shipping box.

3. Place the preamplifier in a safe location and remove the protective plastic

wrapping.

We recommend that you place the preamplifier on a firm, level surface, away from

excessive heat, humidity, or moisture. The preamplifier requires at least two inches

(5 cm) of clearance on each side and at least two inches (5 cm) of clearance

above to provide adequate ventilation. Installations inside cabinetry may need extra

ventilation.

The Illusion II preamplifier has superb regulation and does not require a dedicated

AC circuit. Avoid connections through extension cords or multiple AC adapters. High

quality 15 amp AC strips are acceptable. The use of AC line conditioning devices is

not recommended. The features provided by these devices are already on board the

Illusion II.

WARNINGS

Krell Illusion II 1

Unpacking

Krell Industries, LLC., 45 Connair Road,Orange, CT 06477-3650 USA

TEL 203-298-4000, FAX 203-891-2028, E-MAIL contact@krellonline.com

WEB SITE http://www.krellonline.com

Connecting the

Illusion II

to Your System

Position the preamplifier where you intend to use it in your system.

1. Neatly arrange and organize wiring to and from the preamplifier and all

components. Separate the AC wires from any audio cables to prevent hum or

other unwanted noise from being introduced into the system.

2. Connect the outputs of your source equipment to the appropriate balanced (11),

or single-ended inputs (12) on the Illusion II.

3. Connect the main outputs (13) on the Illusion II to your amplifier’s inputs.

4. Connect the supplied AC power cord to the IEC power cord receptacle (17)

of the preamplifier.

5. Plug the other end of the AC power cord into AC power and turn on the rear

power switch. The display (3) shows

Illusion II SOFTWARE VERSION, and the stand-

by/power indicator (4) illuminates red, indicating that the Illusion II is in stand-by

mode. When the display shuts off, the Illusion II is ready to be powered on.

Note

Use only the power cord provided with the Illusion II to make the connection to AC power.

Operation with a power cord other than the one supplied by Krell can induce noise, limit

current, or otherwise impair the ability of the preamplifier to perform optimally.

After the Illusion II is connected to your system and to AC power you may begin

operation:

1. Press the power button (1) on the front panel, or the remote control power key.

The standby/power Indicator turns blue. The display shows the factory default

input:

S-1, and level: 000. The Illusion II is now in the operational mode.

2. With the preamplifier output muted, or the volume fully attenuated, select a

source manually using the front panel input select buttons (5 or 6) or the remote

input select keys. Start playing the source. Use the level buttons (10) or the

remote level keys to set the volume to a comfortable level.

3. To return the preamplifier to the stand-by mode, press the power button (1) or

remote power key. (We recommend leaving the Illusion II in the stand-by mode

when it is not playing music.)

The balance function allows adjustment of the left and right balance. The options

are:

CENTER, L .5-5 dB <, R .5-5 dB >. The remote control has direct keys (D) to make

these adjustments. For front panel adjustment follow the steps listed below.

1. Press the preamplifier menu button (9), then use the level control knob, or the

remote control up and down keys to select:

BALANCE.

2. Press the enter button (8) or remote enter key. The display shows the default

mode:

CENTER.

3. Use the level buttons, or the up and down keys, to select the desired balance

option from 0 to +5 dB in .5 dB increments, left or right.

4. Press the enter button or key to confirm the selection. The display reads:

BALANCE.

5. Press the menu button to exit the menu.

4 Krell Illusion II

Operating the

Illusion II

1 Preamplifier chassis

1 IEC connector (AC power) cord

1 Remote control

2 AAA remote batteries

1 T-10 Torx wrench for remote

1 Setup Guide

Placement

AC POWER GUIDELINES

SERIAL NUMBER

Overview

Channel Balance

Adjustment

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. When level

matching is critical, keep this

gain value in mind.

Note

Save all packing materials. If

you need to ship the Illusion II

in the future, repack the unit in

its original packaging to prevent

shipping damage.

This product complies with the

EMC directive (89/336/EEC)

and the low-voltage directive

(73/23/EEC).

This CLASS 1 apparatus must

be connected to a MAINS

socket outlet with a protective

earthing connection.

MODEL Illusion II Preamplifier

THE LEADER IN AUDIO ENGINEERING

1 2

Illusion II 1
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Summary of Contents

Page 1 - Illusion II

Illusion IIStereo PreamplifierSETUP GUIDEGetting Started Thank you for your purchase of the Krell Illusion II Stereo Preamplifier. The Illusion II f

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1 5 9786310242 Krell Illusion II Krell Illusion II 3Figure 1 The Illusion II Front PanelFigure 2 The Illusion II Remote Cont

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Krell Illusion II Preamplifier User Manual

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