User manual ROTEL RA-840BX

[. . . ] 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. [. . . ] The RA-840BX 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 RA-840BX. Be sure the Power Switch on the front panel of the RA-840BX is turned off. Then, plug one end of the cord into the AC power connector on the back panel of the amplifier. Plug the other end into an appropriate AC outlet. Your RA-840BX is configured at the factory for the proper AC line voltage in the country where you purchased it (USA: 115 volts/60 Hz , Europe: 230 volts/50 Hz). The AC line configuration is noted on a label on the back panel. The RA-840BX can be turned on and off automatically by using its "12V Trigger" system. The Turn On/Off Mode Selector switch is used to select which method is used. With the switch in the OFF position, the amplifier is turned on or off manually using the front panel power switch. 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. The RA-840BX has two pair of color coded connections for each group of amplifier channels. Labels above the connectors show the proper connections for connecting speakers. These speaker connectors accept bare wire, connector lugs, or "banana" type connectors (except in the European Community countries where their use is not permitted). route the wires from the RA-840BX to the speakers. Give yourself enough slack so you can move the components to allow access to the speaker connectors. If you are using banana plugs, connect them to the wires and then plug into the backs of the speaker connectors. The collars of the speaker connectors should be screwed in all the way (clockwise). If you are using terminal lugs, connect them to the wires. If you are attaching bare wires directly to the speaker connectors, separate the wire conductors and strip back the insulation from the end of each conductor. [. . . ] The polarity ­ the positive/negative orientation of the connections ­ for every speaker and amplifier connection must be consistent so all the speakers will be in phase. if the polarity of one connection is mistakenly reversed , bass output will be very weak and stereo imaging degraded. All wire is marked so you can identify the two conductors. there may be ribs or a stripe on the insulation of one conductor. [. . . ]