User manual ROTEL RD-835

[. . . ] 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. WARNING: The rear panel power cord connector is the mains power disconnect device. The apparatus must be located in an open area that allows access to the cord connector. [. . . ] Rotel's engineers work as a close team, listening to, and fine tuning, each new product until it reaches their exacting musical standards. They are free to choose components from around the world in order to make that product the best they can. You are likely to find capacitors from the United Kingdom and Germany, semiconductors from Japan or the United States, while toroidal power transformers are manufactured in Rotel's own factory. And, as more and more electronics are produced and later discarded, it is especially important When used in a high-quality music or home theater system, your Rotel amplifier will provide years of musical enjoyment. The RD-835 is a high-power, twelve-channel power amplifier, providing the highest level of audio performance. A massive power supply, premium components, and Rotel's Balanced Design ensure superb sound quality. If installed in a cabinet, make sure that there is adequate ventilation. Your RD-835 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). Be sure the power switch on the front panel of the RD-835 is turned off. Then, plug one end of the cord into the AC power connector on the back panel of the amplifier. If you are going to be away from home for an extended period of time, it is a sensible precaution to unplug your amplifier. Make sure that the shelf or cabinet can support its considerable bulk. An input jack for connecting the wires carrying a +12 volt trigger signal from a Rotel preamp or surround sound processor to turn the amplifier on and off. To use this feature the adjacent slide switch must be placed to the left position (see previous section). The TRIGGER INPUT accepts any control signal (AC or DC) ranging from 3 volts to 30 volts. For example in large systems where the RD-835 is being used to drive multiple pairs of speakers. See figure 2 are two RCA inputs for each of the six pair of amplifier channels. These RCA inputs accept audio signals from preamplifiers or surround sound processors. For each pair of amplifier channels, connect the left channel output of your preamp to the LEFT INPUT on the RD-835. The 12V TRIG jack labeled OUT is used to pass the remote turn-on signal to a second Rotel amplifier. Any 12V Trigger signal at the INPUT jack will be passed through to the OUT jack. Instead, the protection circuit monitors the temperature of the output devices and shuts down the amplifier if temperatures exceed safe limits. [. . . ] Standard speaker wire will work, but can result in lower output or diminished bass response, particularly over longer distances. For best performance, you may want to consider special high-quality speaker cables. Your authorized Rotel dealer can help in the selection of cables for your system. Insert the wire into the open and turn the screw to clamp the wire in place. [. . . ]