User manual DYNACORD XA 4000

[. . . ] Unplug this apparatus during lightning storms or when unused for long periods of time. refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped. Do not expose this equipment to dripping or splashing and ensure that no objects filled with liquids, such as vases, are placed on the equipment. [. . . ] Accordingly, input and output connectors are directly interconnected in parallel, offering permanent electrical connection, without regard to the setting of the Power-ON switch. Although connecting unbalanced cables to the power amplifier inputs is possible as well, using balanced cables is always preferable. a great number of today's audio appliances employ balanced outputs. With balanced cabling, the shield connects all metal enclosure parts and therefore efficiently eliminates the introduction of external interference ­ mostly noise and hum. This mechanically and electrically safe connection method complies with any safety standard allowing the use of high-performance loudspeaker cables with diameters of up to 4 x 2. The DYNACORD accessory program offers single connectors and couplings as well as high-performance loudspeaker cables. The four poles of the system connector are assigned as follows: the low-frequency signal is present via pins 1+ and 1- while pins 2+ and 2- carry the Mid/ Hi-range audio signal. Using four-pole SPEAKON speaker cables allows quick, trouble-free and correct connection of loudspeaker cabinets that provide system connectors ­ like FX 12 and FX 20. a plastic lid covers SUB and TOP connectors to prevent inadvertent erroneous connection. Remove these covers only in the event that you are going to connect speaker systems that do not provide system connectors. Keep in mind that the bass and mid/hi audio signals are present on the SUB and TOP connectors' pins 1+ and 1-. Caution: The FLASH symbol " " at the loudspeaker connectors indicates that high voltages are present at these connectors which, when getting in contact, can cause harm to someone's health. When operating the power amplifier in a 19" rack-shelf system or cabinet together with other equipment, setting the switch to its GROUNDED position is recommended. When operating the power amplifier together with appliances with differing ground potentials, set the switch to its UNGROUNDED position. Replacing the fuse is only permissible for authorized service personnel using a new fuse of the same type with identical amperage, voltage and blow characteristics. The high-performance mains cord supplied with your power amplifier complies with applicable safety regulations, plus that its diameter corresponds to the power amp's power output capacity. Whenever possible make sure to use the supplied mains cord for connecting the power amp to the mains network. Using a different mains cord with a smaller diameter results in higher leakage, consequently reducing the amplifier's maximum power output capacity. The following tables are useful in determining power supply and cabling requirements. The power drawn from the mains network is converted into acoustic output to feed the connected loudspeaker systems plus heat. The difference between drawn power and dispensed power is referred to as leakage power or dissipation (Pd). The amount of heat resulting from power dissipation might remain inside of a rack-shelf and needs to be diverted using appropriate measures. [. . . ] Stacking the Mid/Hi cabinets on top of each other almost doubles coverage, without the drawback of too high acoustic output in the proximity of the stage. Using the "stack & splay" technique ­ turning the stacked Mid/Hi cabinets so that they aim at slightly different angles ­ even improves coverage of the audience area. 4 shows a setup consisting of a complete Xa standard installation per side, which is especially suitable for major clubs and large festival tents up to a size of approximately 3000 sqm. If needed, this configuration allows expanding each Xa system through adding additional loudspeaker cabinets (please refer to Fig. [. . . ]