User manual AUSTRALIAN MONITOR IS1200

[. . . ] 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. 2 Features · · · · · · · · · · · Custom 2RU design. [. . . ] Output Wiring When wiring to your speakers, always use the largest gauge wire your connector will accept. The longer the speaker lead, the greater the losses will be, resulting in reduced power and less damping at the load. We recommend using a heavy-duty, two core flex (four core flex if bi-amping) 10 to 12 gauge (2mm2 to 2. 5mm2 or 50/0. 25 or equivalent) as a minimum. 10 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. The "Channel A" speaker connector actually carries both channel A & Channel B outputs (see: Speaker Connector Wiring Diagrams). The "Channel B" speaker connector carries the Channel B output only. This arrangement allows you the option of connecting to the outputs separately or together. Connecting through a single connector has the advantage of minimising connections, preserving phasing and simplifying channel allocation, which is particularly important when bi-amping. IMPORTANT Do not overload your amplifier by connecting the channel B output twice!Channel A is used as the "dominant" channel and when sourcing a dual output from Channel A, the following standard should be used: Channel A = Left or Low Frequencies. Channel B = Right or High Frequencies. Operation IMPORTANT All signal source equipment should be adequately earthed. Faults can and do occur in mains connected equipment where the chassis can become "live" if it is not properly earthed. In these instances, the fault in a "floating" (ungrounded) piece of equipment will look for the shortest path to ground, which could possibly be your amplifier's input. If the fault current is large enough, it will destroy the input to your amplifier and look for the next available path, which may be you! 11 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 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. Check the continuity of all interconnecting leads to your amplifier; ensure that there are no open or short circuited conductors. Ensure that the power handling of your load (speakers) can adequately cope with the power output of the amplifier. Before operating your IS Series amplifier, ensure that: - The attenuators are at the "OFF" position (fully anticlockwise). - The GROUND LIFT Switch is not engaged (should be in the "Ground" position). [. . . ] This will ensure the shield on your input wiring actually goes to the amplifier chassis and subsequently to earth. You will defeat the amplifiers internal grounding scheme and possibly cause instability in the amplifier. Always ensure that your amplifier is off and the attenuators are down when you engage this switch. This switch should only be used when the amplifier is operated from a balanced signal source. [. . . ]