User manual ROTEL RA-840BX

[. . . ] Immediately stop using the component and have it inspected and/or serviced by a qualified service agency if: · The unit has been dropped or damaged in any way Place the unit on a fixed, level surface strong enough to support its weight. A family whose passionate interest in music led them to manufacture high fidelity components of uncompromising quality founded Rotel over 40 years ago. Over the years that passion has remained undiminished and the goal of providing exceptional value for audiophiles and music lovers regardless of their budget, is shared by all Rotel employees. The engineers work as a close team, listening to, and fine tuning each new product until it reaches their exacting musical standards. [. . . ] 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. 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 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. Position, the amplifier is turned on automatically when a 12 volt trigger signal is applied to the 3. Turning the switch OFF cuts power to the amplifier, regardless of whether or not a trigger signal is present. Thermal and protection circuits protect the amplifier against potential damage in the event of extreme or faulty operating conditions. unlike many designs , the RA-840BX's protection circuit is independent of the audio signal and has no impact on sonic performance. The collars of the speaker connectors should be screwed in all the way (clockwise). 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. Place the connector lug around the shaft, or insert the bundled wire into the hole in the shaft. The RA-840BX has standard unbalanced RCAtype input connectors, the type used on nearly all audio equipment. There are two RCA inputs for each of the four pair of amplifier channels. These RCA inputs accept audio signals from preamplifiers or surround sound processors. The nominal impedance of the loudspeaker(s) connected to each chanel of the RA-840BX in the various operating modes should be no lower than minimum 4 ohms The input signal to the "A" channels to be passed on to one or more of the other sets of channels by using the input signal LINK switches. When the "B", "C" and/or "D" channels have their Input Signal Link Switches set to the LINK position, they receive the same signal as the "A" channels. When these switches are set to the STEREO position the corresponding channel receive their signals from the normal inputs. The size and quality of the wire can have an audible effect on the performance of the system. Standard speaker wire will work, but can result in lower output or diminished bass response, particularly over longer distances. [. . . ] If using signal sensing auto power-on, make sure that a signal is present at the inputs. If using 12V trigger power-on, make sure that a trigger signal is present at rear panel screw terminals. If the amp is getting AC power, but is producing no sound, check the PROTECTION INDICATORS on the front panel. If not, check all of your connections and control settings on associated components. [. . . ]