Rotel RMB-1076 owner manual AC Power Input, Power Switch Indicator, Auto Turn On/Off Mode Selector

RMB-1076Six Channel Power Amplifier 6

AC Power and Control

AC Power Input -

The RMB-1076 is supplied with the proper AC power cord. Use only this cord or an exact equivalent. Do not use an extension cord. A heavy duty multi-tap power outlet strip may be used, but only if it is rated to handle the current demand of the RMB-1076.

Be sure the Power Switch on the front panel of the RMB-1076 is turned off. Then, plug one end of the cord into the AC power connector

-on the back panel of the amplifier. Plug the other end into an appropriate AC outlet.

Your RMB-1076 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). The AC line configuration is noted on a label on the back panel.

NOTE: Should you move your RMB-1076 to another country, it is possible to config- ure your amplifier for use on a different line voltage. Do not attempt to perform this conversion yourself. Opening the enclosure of the RMB-1076 exposes you to danger- ous voltages. Consult a qualified technician or the Rotel factory service department for information.

If you are going to be away from home for an extended period of time, it is a sensible precaution to unplug your amplifier.

Power Switch and

Indicator 12

The Power Switch is located on the front panel. To turn the amplifier on (or to activate either of the optional automatic power-on modes), push the switch in. 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.

Auto Turn On/Off Mode Selector 9

The RMB-1076 provides three options for manual or automatic power on/off operation. These modes are selectable using a three-posi- tion slide switch on the back panel:

•With the switch in the OFF position, the amplifier is turned on or off manually us- ing the front panel power switch. Use this mode if you are using a switched AC outlet to control power to the amplifier.

•With the switch in the SIGNAL SENSING position, the amplifier turns on automatically when a signal is sensed at the inputs. The amplifier will go into standby mode with no signal. The front panel power switch overrides this function. It must be ON for the signal sensing to work. Turning the switch OFF cuts power to the amplifier, regardless of whether or not a signal is present.

•With the switch in the 12V TRIG. position, the amplifier is turned on automatically when a 12 volt trigger signal is applied to the 3.5mm jack to the left of the switch. The amplifier will go into standby mode with no signal if the +12 volt signal is not present. 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.

+12V Trigger Input

and Output 8

The jack labeled IN is for connecting the 3.5mm Plug/Cable carrying a +12 volt trigger signal 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). This input accepts any control signal (AC or DC) ranging from 3 volts to 30 volts.

The jack labeled OUT is for connecting another 3.5mm plug/cable to provide a 12V trigger signal to other components. The 12V output signal is available whenever a +12 volt trigger signal is applied to the IN connector.

Protection Indicator 3

Thermal and protection circuits protect the am- plifier against potential damage in the event of extreme or faulty operating conditions. Unlike many designs, the RMB-1076’s protection cir- cuit 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-1076 includes over- current protection which operates only when load impedances drop too low. This protection is independent for each of the three pair of channels and is indicated by the front panel

PROTECTION LED.

Should a faulty condition arise, the amplifier channel at fault will stop playing and the PRO- TECTION LED 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 LED 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.

Stereo Mode Selection

It is useful to think of the RMB-1076 as three stereo amplifiers in a single chassis.

•Stereo mode: Conventional 2-channel stereo operation for a pair of amplifier channels. Minimum speaker load: 4 ohms.

Input Select Switches 6

A rear panel switch adjacent to the inputs can select LINK to be On or Off for the first pair of amplifier channels.

For Stereo mode: Slide the switch as- sociated with the desired pair of amplifier channels to the right or OFF position. Use both LEFT and RIGHT input connectors, and connect one speaker to each pair of speaker connectors.

NOTE: For groups “B” and/or “C”, you can also place the INPUT SELECT switch to the ON position for Stereo mode. This routes the input signals from the “A” group