User manual AUSTRALIAN MONITOR SY2400

[. . . ] 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 block fan intake or exhaust ports. [. . . ] Connecting through a single connector has the advantage of minimising connections, preserving phasing and simplifying 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. 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). If running in BRIDGE mode, only the red binding posts are used. 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. [. . . ] 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. Fans Due to the openness of the air path through your Synergy-2 Series amplifier, very little dust should settle within the amplifier. The unit has been designed so that any dust and/or foreign particles that do settle within the amplifier will not unduly hinder the cooling of the amplifier. The grille in front of the fans will act to limit the amount of dust and lint entering the amplifier. [. . . ]