User manual AUSTRALIAN MONITOR SY 1200

[. . . ] Professional Audio Amplifier SY 400 SY 800 SY 1200 SY 1600 SY 400V SY 800V SY 6125 SY 4200 Operation Manual IMPORTANT! Please read carefully. This operation manual contains important information regarding safety precautions, installation, performance, operation and maintenance of your Synergy-Series power amplifier. You should familiarize yourself with the contents of this manual before operating your amplifier. Safety Precautions and Labelling The rear panel of this amplifier has a number of markings and internationally recognized symbols relating to the hazards and precautions that should be taken when operating MAINS connected equipment. The presence of a LIGHTNING FLASH with an arrowhead contained within the boundaries of an equilateral triangle is intended to alert the user that dangerous uninsulated voltages may exist within the amplifiers enclosure. These voltages may be of a sufficient magnitude as to constitute the risk of an electrical shock. [. . . ] When wiring for a balanced source, the connector going to the input of your amplifier should be wired as follows: Pin 1 = GROUND / SHIELD. Pin 3 = COLD (Reverse Phase - inverting). When wiring from an unbalanced source you must ensure that pin 3 is connected to pin 1 (input ground), either by linking the pins in the input connector or by the source equipment's output wiring. When wiring for an unbalanced source: Pin 1 = GROUND/SHIELD Pin 2 = HOT (in phase with the amplifier's output), Pin 3 = GROUND/SHIELD (joins to pin 1). NOTE: In-line XLR connectors often have a termination lug that connects directly to the chassis of the connector. Do not link this lug to pin 1 at the amplifier's input as it will defeat the amplifier's input grounding scheme. Mounting Your amplifier is designed for standard 19" rack mounting and occupies 2 EIA rack units (3. 5"). The mounting centres are: Vertical: 3. 0" (76. 2mm) Horizontal: 18. 2" (461. 2mm) to 18. 7" (473. 8mm). The slots in the mounting flange will accept bolt diameters up to 1/4" (6. 35mm). We recommend that you provide additional support for the amplifier, especially if road use is planned, as the weight could bend some rack frames. This support can be provided by secure shelving, support rails or a rear rack mounting strip to match up with the rear rack mount ears provided on your Synergy Series amplifier. Cooling Each channel of your Synergy Series amplifier is cooled by an axial fan which draws cool air from the front of the amplifier and expels the heated air out the rear of the amplifier. These amplifiers offer two speed fans which run at half speed, switching to full speed when the internal heatsink temperature exceeds 60 C (128 F). 0 0 An unrestricted airflow into and out from the amplifier must be provided. Any restriction of the air flow will cause heat to build up within the unit and possibly force the unit into its thermal shutdown mode. If the amplifiers are to be operated in an environment where the airflow is restricted such as sealed racks, the cooling should be supplemented by extra cooling 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 (2mm to 2. 5mm or 50/0. 25 or equivalent) as a minimum. 2 2 Installation 15 connecting to the outputs separately or together. Connecting through a single connector has the advantage of minimising connections, preserving phasing and simplify channel allocation, which is particularly important when bi-amping or in bridge mode. 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 normally be used (depending on speaker system wiring): Channel A = Left or Low Frequencies. When in bridge mode: Pin 1+ = Bridge Output Positive Pin 2+ = Bridge Output Negative. 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). If running in BRIDGE mode, only the red binding posts are used. For the SY400, SY800, SY1200, SY1600: When bridging, Channel A provides the positive output to the load and channel B provides the negative output to the load. [. . . ] 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. NOTE: Be wary of quasi-balanced outputs, these are often no more than floating unbalanced outputs. Australian Monitor 18 Maintenance 5. Maintenance Only competent or qualified persons should attempt any service or maintenance of your amplifier. The fan blades are accessible once the lids are removed and can be easily cleaned. [. . . ]