Australian monitor IS1200, IS600 User Manual

Clever Features, Contractor Friendly

IS600

IS1200

Stereo Professional Audio Amplifiers

Installation

&

Operation Manual

Introduction

The Australian Monitor Installation Series IS600 & IS1200 are 2 RU stereo power
amplifiers. The IS600 delivers 300 watts per channel @ 4 ohms & the IS1200
delivers 600 watts per channel @ 4 ohms. Designed for permanent
installations where high quality audio reproduction is required on a small
budget, the IS series deliver the sound quality & features contractors require.
The IS series continues the Australian Monitor tradition of delivering an
amplifier packed with clever features at a contractor friendly price.

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Features

• Custom 2RU design.

• High efficiency toroidal mains transformer.

• Binding post and 4 pole speaker output connection.

• Stereo or Parallel operation.

• Balanced inputs and buffered attenuators.

• Signal Present indication.

• Output clip indication.

• Efficient front to back cooling.

• Twin speed axial fans.

• Thermal fault indication.

• Signal ground lift switch.

Protection Features

• Short circuit protection.

• Overload protection.

• Soft Start.

• Thermal protection.

3

Contents

Page

1. Introduction 2

2. Controls, Connectors & Indicators 5

2.1 Front Panel 5

2.2 Rear Panel 7

3. Installation 9

4. Operation 11

5. Maintenance 14

6. Specifications 15

IMPORTANT!

Please read carefully.

This operation manual contains important information regarding safety precautions,
installation, performance, operation and maintenance of your IS-Series power amplifier. You
should familiarize yourself with the contents of this manual before operating your amplifier

The user should not attempt to service the amplifier. Only qualified and knowledgeable
personnel familiar with the internal workings of the amplifier should attempt any repair,
servicing or authorized modification to the amplifier. The amplifier does not contain any parts
which the user can service or re-use in this or any other product.
If you are in need of special assistance and the information you require is outside the scope
of this manual, please contact your nearest service agent or Australian Monitor direct:

THE TECHNICAL OFFICER
AUSTRALIAN MONITOR
C/- AUDIO TELEX COMMUNICATIONS PTY LTD
PRIVATE BAG 149,
SILVERWATER. N.S.W. 1811
AUSTRALIA.
Phone Fax
Australia [phone] (02) 9748-2537
International 61-2-9647-1411 61-2-9748-2537

Email [e-mail]
Internet www.australianmonitor.com.au

4

Front Panel

1

2 4

5 6

3

1 Attenuator

There are 2 level controls on all IS models. Each control is labelled for the
channel which it controls. 0dB indicates minimum attenuation.

2 Clip Indicator

This LED displays the status of the output stage and displays two levels of
operation.

These levels are:
Below clip level (unlit)
Clipping & above (red)

The LED will change to red once the output exceeds the clipping point of
the amplifier’s output stage. The threshold is referred to the amplifier supply
rails and alters with changes in the mains supply, changes in the load and
duty cycle fluctuations.
The attack and decay time (ballistics) of the status circuit are those of a
Peak Programme Meter (P.P.M.)

5

NOTE: The amplifier is not damaged by running into clipping, but speakers
may be. To maximise the life of your speakers, try to keep clipping

infrequent.

3 Power Switch

This switches AC power to the amplifier. Press the switch to up for power on
and down for power off. At start-up (turn-on), the input to the amplifier is
muted for approximately two seconds.

4 Protect Indicator

This red LED will illuminate when thermal shutdown occurs.

5 Active Indicator

This LED will illuminate blue and indicates that the amplifier is ON and
receiving AC mains power.

6 Signal Indicator.

This LED displays the status of the output stage and varies in intensity in
proportion to the output signal level.

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