User manual ROTEL RMB-1048

[. . . ] WARNING: There are no user serviceable parts inside. refer all servicing to qualified service personnel. WARNING: To reduce the risk of fire or electric shock, do not expose the unit to moisture or water. Do not allow foreign objects to get into the enclosure. [. . . ] The AC line configuration is noted on a label on the back panel. The RMB-1048 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. â· 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. The front panel POWER SWITCH overrides this function. it must be ON for the +12V trigger to work. 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 RMB-1048's protection circuit is independent of the audio signal and has no impact on sonic performance. Instead, the protection circuit monitors the temperature of the output devices and shuts down the amplifier if safe limits are exceeded. In addition, the RMB-1048 includes overcurrent protection which operates only when load impedances drop too low. This protection is independent for each of the four pair of channels with separate front panel PROTECTION LEDS for each. Should a faulty condition arise, the amplifier will stop playing and one or more of 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. To use this feature the adjacent slide switch must be set in the 12V TRIG position (see previous section). This input accepts any control signal (AC or DC) ranging from 3 volts to 30 volts. NOTE: Should you move your RMB-1048 to another country, it is possible to configure your amplifier for use on a different line voltage. Do not attempt to perform this conversion yourself. [. . . ] For best performance, you may want to consider special high-quality speaker cables. Your authorized Rotel dealer can help in the selection of appropriate cables for your system. The input signal that goes to the "A" inputs is also passed on the Signal Output Link connectors. This can be used to provide an input signal to another audio component. [. . . ]