User manual AUSTRALIAN MONITOR SY2200

[. . . ] PROFESSIONAL AUDIO AMPLIFIER OPERATION MANUAL SY2200 SY2400 SY2700 ROFESSION AUD IO AMP L UD I M P O RTA N T SAF E TY INF ORMATION 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. 1. Save the carton and packing material even if the equipment has arrived in good condition. Should you ever need to ship the unit, use only the original factory packing. 13. Do not operate equipment on a surface or in an environment which may impede the normal flow of air around the unit, such as a bed, rug, weathersheet, carpet, or completely enclosed rack. [. . . ] When in bridge mode: Pin 1+ = Bridge Output Positive Pin 2+ = Bridge Output Negative. 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-2 Series amplifier. Cooling Each channel of your Synergy-2 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 600 C (1280 F). 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 fans to evacuate the heated air and aid the flow of cool air through the unit. 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. 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). When bridging, Channel A provides the positive output to the load and channel B provides the negative output to the load. Input Wiring IMPORTANT: Do not directly connect pin 1 on the amplifier's input or strapping XLR, to the amplifier's chassis, speaker ground or power ground!WARNING: Input signal ground is not to be used as a safety ground (earth). 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 channels can be fed from a single connector. S Y N E R G Y 2 ­ O P E R AT I O N M A N U A L PA G E 7 I N S TA L L AT I O N Hum Problems Most equipment is designed for minimum hum when used under ideal conditions. When connected to other equipment, and to a safety earth in an electrically noisy environment, problems may occur. The three "E"s of hum and hum related noise which can plague your audio system are: a) Electrostatic radiation, b) Electromagnetic radiation, and c) Earth loops Electrostatic radiation capacitively couples to system elements, causing an interference voltage that mainly affects higher impedance paths, such as amplifier inputs. The source is generally a nearby high voltage, such as a mains lead or a speaker lead. The problem can usually be reduced by moving the offending lead away, or by providing additional electrostatic shielding (i. e. Electromagnetic radiation induces interference currents into system elements that mainly effect lower impedance paths. Radio transmitters or stray magnetic fields from mains transformers are often the cause of this problem. It is generally more difficult to eliminate this kind of interference, but again, moving the source away or providing a magnetic shield (i. e. [. . . ] During this period you will hear a couple of relays "click", indicating mains is now directly applied to the amplifier and the signal path is connected. While the ICS circuit operates there is also a 30dB mute on the signal input. After two seconds this mute will release, allowing any applied signal to pass un-attenuated. When switching the amplifier off, wait a couple of seconds before switching the amplifier on again. [. . . ]