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.
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.
Contents 1. Introduction 2. Controls, Connectors & Indicators 2.1 Front Panel 2.2 Rear Panel 3. Installation 4. Operation 5. Maintenance 6. Specifications Page 2 5 5 7 9 11 14 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.
Front Panel 1 2 3 5 4 6 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 Clipping & above (unlit) (red) The LED will change to red once the output exceeds the clipping point of the amplifier’s output stage.
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.
Rear Panel 7 13 8 9 14 10 12 11 15 7 Balanced XLR Input A female 3-pin XLR type connector is provided for each input: Pin 1 = Signal Ground; Pin 2 = Hot (non-inverting or in phase); Pin 3 = Cold (inverting or reverse phase). 8 Balanced 6.35mm TRS Input A female 6.35mm TRS connector is provided for each input. Tip = Hot (non-inverting or in phase); Ring = Cold (inverting or reverse phase); Sleeve = Signal Ground.
Note: This is not Bridge mode. 11 Ground Lift Switch When this switch is engaged, it disconnects signal ground from the input connectors on both channels. It is intended to be used when “hum” is caused by earth loops (due to different ground potentials between source equipment and the amplifier) or stray magnetic field pick up on the input ground/shield wiring.
Installation Power Requirements Ensure that your mains voltage is the same as the rear panel mains voltage marker (+/- 10%). Mounting Your amplifier is designed for standard 19” rack mounting and occupies 2 EIA rack units. Cooling Each channel of your IS Series amplifier is cooled by an axial fan which draws cool air from the front of the amplifier and expels heated air out the rear of the amplifier.
the amplifiers are to be operated in an environment where the airflow is restricted, such as sealed racks, cooling should be supplemented by extra cooling fans to evacuate the heated air and aid the flow of cool air through the amplifier. Input Wiring IMPORTANT Do not directly connect pin 1 on the amplifier’s input XLR or TRS jack, to the amplifier’s chassis, speaker ground or power ground! NOTE: Input signal ground is not to be used as a safety ground (earth).
Binding Post Outputs When terminating to the 4 mm binding post (banana jack) output connectors, banana plugs or bare wires can be used. The red terminal is positive and the black terminal is negative (ground). Speaker Outputs When using the 4 pole speaker connector for speaker output, use only the mating 4 pole in-line connector. This connector is designed so that both speakers can be fed from a single connector. Two speaker connectors are provided on the amplifier.
Before making any connections to your IS Series amplifier, observe the following: Ensure the mains voltage supply matches the label on the rear panel of your amplifier (+/- 10%). Ensure that the power switch is OFF. Ensure that all system grounds (earth) are connected from a common point. Avoid powering equipment within a system from multiple power sources that may be separated by large distances.
Sensitivity Your amplifier is a linear device operating with a fixed input to output voltage gain (less attenuation). The maximum output voltage swing is determined by the applied mains voltage, load, load type and the duty cycle of the applied signal. The input sensitivity for your IS Series amplifier when the attenuator is at maximum position (fully clockwise) is determined by the Input Sensitivity switch. There are 3 settings for rated power into a 4 ohm load. 0.775V in for rated power out 1.
Earth loops can arise from the connection of the various pieces of equipment and their connections to various safety earths. This is by far the most common cause of hum and it occurs when source equipment and the amplifier are plugged into different points along the safety earth where the safety earth wiring has a current flowing through it. The current flowing through the wire produces a voltage drop due to the wire’s resistance.
Maintenance Only competent qualified persons should attempt any service or maintenance of your amplifier. Your IS Series amplifier will need minimal maintenance. No internal adjustments need to be made to the unit to maintain optimum performance. To provide years of unhindered operation we suggest a maintenance inspection be carried out on a regular basis, say every 12 months or so. NOTE; The following instructions are intended for action by qualified personnel only.
IS600 Specifications Output @ 8 ohms Output @ 4 ohms Frequency Response THD Crosstalk Slew Rate Damping Factor Input Impedance Signal/noise ratio Weight Dimensions (wxdxh) 2 x 200 watts 2 x 300 watts <10Hz - >50kHz (-3dB) <0.03% @1 kHz 60dB 12.5 v/ms 250 into 8 ohms/ 125 into 4 ohms 20Kohm >99dB 20Hz-20kHz 16.
