User manual ROTEL RB-870

[. . . ] If the unit is exposed to moisture, or a foreign object gets into the enclosure, immediately disconnect the power cord from the wall. Take the unit to a qualified service person for inspection and necessary repairs. Read all the instructions before connecting or operating the component. Keep this manual so you can refer to these safety instructions. [. . . ] There should be 10 cm (4 inches) of clearance around the chassis, and reasonable airflow through the installation location, to prevent the amplifier from overheating. Likewise, remember the weight of the amplifier when you select an installation location. Make sure that the shelf or cabinet can support its weight. The RB-870 is supplied with the proper AC power cord. Use only this cord or an exact equivalent. A heavy duty multi-tap power outlet strip may be used, but only if it is rated to handle the current demand of the RB-870. Be sure the Power Switch on the front panel of the RB-870 is turned off. Then, plug one end of the cord into the AC power connector 9 on the back panel of the amplifier. Plug the other end into an appropriate AC outlet. Your RB-870 is configured at the factory for the proper AC line voltage in the country where you purchased it (USA: 120 volts/60 Hz, Europe: 230 volts/50 Hz). The AC line configuration is noted on a label on the back panel. To use this feature the adjacent switch 7 must be set in the 12V TRIG position (see previous section). This input accepts any control signal (AC or DC) ranging from 3 volts to 30 volts. To turn the amplifier on (or to activate either of the optional automatic power-on modes), push the switch in. The LED indicator above the switch will light, indicating that the amplifier is turned on. To turn the amplifier off, push the button again and return it to the out position. See Figure 2 The RB-870 has standard unbalanced RCAtype input connectors, the type used on nearly all audio equipment. There is an RCA input for each of the two amplifier channels. These RCA inputs accept audio signals from preamplifiers or surround sound processors. See Figure 2 The RB-870 has two sets of dual binding post speaker connection terminals, one set for each amplifier channel. in addition there are two four-contact Speakon® connectors. Some speakers also have Speakon® connectors which make it easy to connect the speakers by simply plugging in wires that are terminated with Speakon® plugs. [. . . ] Push the insert all the way into the housing. Slide the chuck down the wire into place behind the insert. The nominal impedance of the loudspeaker(s) connected to each channel of the RB-870 should be no lower than 4 ohms. The size and quality of the wire can have an audible effect on the performance of the system. [. . . ]