User manual ROTEL RA-840BX2

[. . . ] Heed all warnings and safety information in these instructions and on the product itself. You must allow a minimum 10 cm or 4 inches of unobstructed clearance around the unit. Do not route the power cord where it will be crushed, pinched, bent, exposed to heat, or damaged in any way. Pay particular attention to the power cord at the plug and where the cord exits the back of the unit. [. . . ] See the "IR Inputs and Outputs" section for more information on ways to expand the IR control capabilities of your system. NOTE: Remove the batteries from the remote control if it will not be used for a long period of time. Exhausted batteries can leak corrosive chemicals which will damage the unit. Like all audio components that handle low level signals, the RA-840BX2 can be affected by its environment. The heat sinks and ventilation openings in the amplifier are designed to dissipate this heat. 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. Remember the weight of the amplifier when you select an installation location. we recommend installing the RA-840BX2 in furniture designed to house audio components. Such furniture is designed to reduce or suppress vibration which can adversely affect sound quality. Ask your authorized Rotel dealer for advice about component furniture and proper installation of audio components. NOTE: The RR-AT94 can be used to operate the basic function of other certain other Rotel components, including Tuners, CD Players and DVD Players. See the "12V Trigger Outlet" section for more information on ways you may be able to turn on and off other components in your system along with the RA-840BX2. ] NOTE: To prevent loud noises that neither you nor your speakers will appreciate, make sure the system is turned off when you make any signal connections. Plug the cable from the turntable into the appropriate left and right phono inputs. If the turntable has a "ground" wire, connect it to the screw terminal to the left of the Phono inputs. If only one set of speakers will be used at any given time, the speakers may have an impedance as low as 4 ohms. If there are times when both the A and B speakers will be used, all the speakers should have an impedance of 8 ohms or more. In practice, very few loudspeakers will present any problems for the RA-840BX2. These are for connecting components such as CD players, Hi Fi or NICAM Stereo video cassette recorders, tuners, Laser Disc players or the analog output from a CD-ROM drive. The Left and Right channels are labeled and should be connected to the corresponding channels of the source component. Give yourself enough slack so you can move the components to allow access to the speaker connectors. If you are using dual banana plugs, connect them to the wires and then plug into the backs of the binding posts. [. . . ] In most cases, the protection circuitry activates because of a fault condition such as shorted speaker wires, or inadequate ventilation leading to an overheating condition. In very rare cases, highly reactive or extremely low impedance speaker loads could cause the protection circuit to engage. If the protection circuitry triggers repeatedly and you are unable to isolate and correct the faulty condition, contact your authorized Rotel dealer for assistance in troubleshooting. Remote only To temporarily mute the sound of the system press the Mute Button on the RR-AT94 remote. [. . . ]