Constant Impedance Lines

not exposed to direct sunlight or direct radiation or reflection from any heat source. Installing the loudspeaker systems choose a location that gets not affected by ex- treme and/or constant vibration or other mechanical oscillation. Also make sure that the speakers are installed at locations that are free from dust and/or moisture.

CAUTION

We strongly recommend that you leave the connection of the appliance to the qualified and experienced service technical who is specialized in connecting electrical and electroni- cally equipment. Do not take the risk of electro-shock or shock hazard. To reduce the risk of electro-shock all connections have to be accomplished before it is permissible to connect the amplifier to the main supply. Before connecting the appliance to the mains supply, once again make certain that all connections are carried out correctly and that no short-circuits exist. The overall sound reinforcement installation has to be in accordance to the laws regu- lations, standards and guidelines that are relevant and applicable in the country where the equipment is going to be operated.

AC POWER SUPPLY

CAUTION

Before using the amplifier for the first time make sure that the appliance IS set in ac- cordance to your mains supply. Otherwise, please consult your Yorkville dealer who will configure your equipment for the correct voltage. Connect the amplifier only to grounded mains outlets. Connecting the amplifier to the mains supply (115Vac re- spectively 230Vac) has to be accomplished by inserting the supplied mains cord into the corresponding socket (15) and afterward plugging it into a mains outlet.

DC POWER SUPPLY

CAUTION

A 24V DC power source (i e. a battery) has to be connected to the terminals (18) that are covered by the protective lid. To reduce the risk of dropping voltage to a minimum and to eliminate the danger of damaging the battery cables by thermal overload, these cables have to be at least 2.5mm2 in diameter, each. Switching the amplifier on or off is performed through the power switch (33).

CONNECTING THE OUTPUT TERMINALS

CAUTION

To avoid the risk of electrical shock, never touch the bare conductors leading to the output terminals of the amplifier when it is in operation. Under figures, show the pos- sible connections of thee OUTPUT speaker terminals accessible by removing the protective cover. Bear in mind the following rules:

•The total impedance of the speakers connected must correspond to that selected on amplifier’s output terminals.

•The sum of the power capacities of the speakers must be no lower than the amplifier’s power capacity.

•The length of the connecting cables must be as possible; in any case, the longer the distance to be covered and the greater must be the cross-section of the cables.

Constant voltage lines

•Each speaker must be equipped with a line transformer with an input voltage equal to that of the line (25, 70, 100V).

•The sum of the power capacities of the speakers must not exceed the output power capacity of the amplifier (i.e. total wattage of speakers installed in zones 1 through 4).