User manual ROTEL RA-970BX

[. . . ] 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 30 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. [. . . ] Please contact your authorized Rotel dealer for answers to any questions you might have. If you are going to be away from home for an extended period of time such as a monthlong vacation, it is a sensible precaution to unplug your amplifier while you are away. Save the RA-970BX shipping carton and all enclosed packing material for future use. Shipping or moving the RA-970BX in anything other than the original packing material may result in severe damage to your amplifier. It is your best record of the date of purchase, which you will need in the event warranty service is ever required. Before any home theater component can be THX Ultra certified, it must incorporate the THX technologies and also pass a rigorous series of quality and performance tests. Only then can a product feature the THX Ultra logo, which is your guarantee that the Home Theater products you purchase will give you superb performance for many years to come. The power switch is located in the center of the front panel of your amplifier. 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 heat sinks and ventilation openings in the amplifier are designed to dissipate this heat. In addition, the RA-970BX includes overcurrent protection which operates only when load impedances drop below 2 ohms. This protection is independent for the left, right and center channels with separate front panel PROTECTION LEDS for each. However, should a faulty condition arise, the amplifier will stop playing and the PROTECTION LEDS on the front panel will light. If this happens, turn the amplifier off, let it cool down for several minutes, and attempt to identify and correct the problem. When you turn the amplifier back on, the protection circuit will automatically reset and the PROTECTION LEDS should go out. 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. When a component with RCA connectors ­ such as a preamplifier or surround sound processor ­ supplies signals to the RA-970BX, the RCA-type phono plug inputs should be used. Connect each of the outputs from the preamplifier or signal processor to the corresponding UNBALANCED INPUT of the RA-970BX. The nominal impedance of the loudspeaker(s) connected to the RA-970BX should be at least 4 ohms. As a general rule, only one speaker shoud be connected to each of the sets of speaker terminals. [. . . ] Use only the open circuit plugs supplied with the RA-970BX; do not use "shorting plugs". The open circuit plugs engage a switch under the center pin of the RCA connector that ensures the DB25 connector input has the proper impedance. 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 reduced and stereo imaging degraded. [. . . ]