Getting Started
Thank you for purchasing the Rotel RB-951MkIIStereo Power Amplifier. When used in a high- quality music or home theater system, your Rotel amplifier will provide years of musical enjoy- ment.
The RB-951MkIIis a sophisticated two-chan- nel power amplifier. Discrete output devices, a massive power supply with toroidal trans- former, premium components, and Rotel’s Bal- anced Design ensure superb sound quality. High current capability allows the RB-951MkIIto drive difficult speaker loads with ease.
Operating Features
•Two-channel Stereo or Bridged Mono op- eration (back panel switchable)
•Optional Parallel Mono operation for driv- ing low impedance multi-speaker loads in custom installation applications (requires resetting internal jumpers).
•User-selectable power on/off configuration: manual, automatic signal sensing, or con- trolled by remote 12 volt trigger signal.
•Front panel input level controls
•Protection circuitry with front panel indi- cators
•Front panel clipping indicators
A Few Precautions
Please read this manual carefully. In addition to basic installation and operating instructions, it provides valuable information on various RB-951MkIIsystem configurations as well as general information that will help you get op- timum performance from your system. Please contact your authorized Rotel dealer for an- swers to any questions you might have. In ad- dition, all of us at Rotel welcome your ques- tions and comments.
Save the RB-951MkIIshipping carton and all enclosed packing material for future use. Ship- ping or moving the RB-951MkIIin anything other than the original packing material may result in severe damage to your amplifier.
Be sure to keep the original sales receipt. It is your best record of the date of purchase, which you will need in the event warranty service is ever required.
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Placement
The RB-951MkIIgenerates heat as part of its normal operation. The heat sinks and ventila- tion openings in the amplifier are designed to dissipate this heat. The ventilation slots in the top cover must be unobstructed. There should be 10 cm (4 inches) of clearance around the chassis, and reasonable airflow through the installation location, to prevent the ampli- fier from overheating.
Likewise, remember the weight of the ampli- fier when you select an installation location. Make sure that the shelf or cabinet can sup- port its considerable bulk. Again, use common sense.
AC Power and Control
AC Power Input 
The RB-951MkIIis supplied with the proper AC power chord. 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 demanded by the RB-951MkII.
Be sure the power switch on the front panel of the RB-951MkIIis 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 RB-951MkIIis configured at the factory for the proper AC line voltage in the country where you purchased it (USA: 115 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 RB-951MkIIto another country, it is possible to configure your amplifier for use on a different line voltage. Do not attempt to perform this conversion your- self. Opening the enclosure of the RB-951MkIIexposes you to dangerous voltages. Consult a qualified technician or the Rotel factory ser- vice 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.
English
Power Switch and Indicator 
The power switch is located on the left side of 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, indicat- ing that the amplifier is turned on. To turn the amplifier off, push the button again and re- turn it to the out position.
Auto Turn On/Off Mode
Selector 
The RB-951MkIIprovides three different options for manual or automatic power on/off opera- tion. These modes are selectable using a three- position slide switch on the back panel as follows:
•With the switch in the OFF position, the amplifier is turned on or off manually using the front panel power switch. Also use this mode if you are using a switched AC outlet to control power to the ampli- fier.
•With the switch in the SIGNAL SENS- ING position, the amplifier turns on au- tomatically when a signal is sensed at the inputs. The amplifier will go into standby mode five minutes after no signal is present. 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. IN position, the amplifier is turned on automatically when a 12 volt trigger sig- nal is present at the screw terminals adja- cent to the left of the switch. The amplifier will go into standby mode 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.
