User manual ROTEL RB-951 MK II

[. . . ] Owner's Manual RB-951 MkII Stereo Power Amplifier POWER AMPLIFIER RB-951 MkII CH1 PROTECTION POWER BRIDGED MONO LEVEL CLIPPING LEVEL CH2 RB-951 MkII Stereo Power Amplifier 1: Controls, Connections, & Internal Jumpers 2 English POWER AMPLIFIER RB-951 MkII CH1 PROTECTION POWER BRIDGED MONO LEVEL CLIPPING CH2 LEVEL 1 2 6 7 8 3 9 4 10 5 CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN AVIS: RISQUE DE CHOC ELECTRIQUE­NE PAS OUVRIR STEREO: 4 OHMS MINIMUM BRIDGED: 8 OHMS MINIMUM 12 TRIG IN SIGNAL SENSE 10 A SPEAKERS CHANNEL 2 CHANNEL 1 CH2 CH1 OFF AC BREAKER WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. INPUT CH2 CH1 POWER AMPLIFIER MODEL NO. RB-951 MkII POWER CONSUMPTION: 200W BRIDGED MONO NORMAL STEREO BRIDGED SIGNAL OUTPUT LINK RB-951 MkII 11 12 13 P2 123 123 123 P3 P1 S603 S602 S604 123 123 S605 S606 Default Jumper settings shown in illustration. 3 2: Hookup (Stereo or Parallel Mono modes) RCA OUTPUTS R L CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN AVIS: RISQUE DE CHOC ELECTRIQUE­NE PAS OUVRIR 12 TRIG IN SIGNAL SENSE 10 A SPEAKERS CHANNEL 2 CHANNEL 1 CH2 CH1 OFF AC BREAKER WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. INPUT CH2 CH1 POWER AMPLIFIER MODEL NO. RB-951 MkII POWER CONSUMPTION: 200W BRIDGED MONO NORMAL STERO BRIDGED SIGNAL OUTPUT LINK RB-951 MkII RB-951 MkII Stereo Power Amplifier 3: Hookup (Bridged Mono mode) 4 RCA OUTPUTS R L CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN AVIS: RISQUE DE CHOC ELECTRIQUE­NE PAS OUVRIR 12 TRIG IN SIGNAL SENSE 10 A SPEAKERS CHANNEL 2 CHANNEL 1 CH2 CH1 OFF AC BREAKER WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. INPUT CH2 CH1 POWER AMPLIFIER MODEL NO. RB-951 MkII POWER CONSUMPTION: 200W BRIDGED MONO NORMAL STERO BRIDGED SIGNAL OUTPUT LINK RB-951 MkII CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN AVIS: RISQUE DE CHOC ELECTRIQUE­NE PAS OUVRIR 12 TRIG IN SIGNAL SENSE 10 A SPEAKERS CHANNEL 2 CHANNEL 1 CH2 CH1 OFF AC BREAKER WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. INPUT CH2 CH1 POWER AMPLIFIER MODEL NO. [. . . ] Your RB-951MkII is 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. A Few Precautions Please read this manual carefully. In addition to basic installation and operating instructions, it provides valuable information on various RB-951MkII system configurations as well as general information that will help you get optimum performance from your system. Please contact your authorized Rotel dealer for answers to any questions you might have. Save the RB-951MkII shipping carton and all enclosed packing material for future use. Shipping or moving the RB-951MkII 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. Should you move your RB-951MkII to another country, it is possible to configure your amplifier for use on a different line voltage. Opening the enclosure of the RB-951MkII exposes you to dangerous voltages. Connect the left channel output of your preamp to the CH 1 INPUT on the RB-951MkII. Connect one output channel of your preamp to the CH 1 INPUT on the RB-951MkII. Make sure that the BRIDGE SWITCH selector switch is in the BRIDGED MONO position. The signal from either will be sent to all speaker outputs. Circuit Breaker A circuit breaker on the rear panel protects the amplifier's electrical circuity. Generally, the circuit breaker will only open under a fault condition which results in excessive current draw. Should it repeatedly open, contact your authorized Rotel dealer for troubleshooting assistance. Protection Indicators A thermal protection circuit protects the amplifier against potential damage in the event of extreme or faulty operating conditions. Unlike many designs, the RB-951MkII'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 temperatures exceed safe limits. In addition, the RB-951MkII includes overcurrent protection which operates only when load impedances drops too low. This protection is independent for the left and right channels with separate front panel PROTECTION LEDS for each. 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. Input Level Controls Bridge Switch and Front Panel Bridge LED A rear panel switch selects Stereo mode or Bridged Mono mode. For Stereo mode: Slide the switch to the right, use both input connectors, and connect one speaker to each pair of speaker connectors. [. . . ] For high sensitivity (0. 775v input for rated power): place the jumpers across pins 1 and 2 on jumper blocks S605 and S606. For low sensitivity (1. 5v input for rated power): place the jumpers across pins 2 and 3 on jumper blocks S605 and S606. Troubleshooting Most difficulties in audio systems are the result of poor or wrong connections, or improper control settings. If you encounter problems, isolate the area of the difficulty, check the control settings, determine the cause of the fault and make the necessary changes. If you are unable to get sound from the RB-951MkII, refer to the suggestions for the following conditions: Selecting Parallel Mono Mode (S602 and P1/P3) As described earlier in this manual, the two most common operating configurations for the RB-951MkII (Stereo mode and Bridged Mono mode) are selectable with a back panel switch and require no internal changes. [. . . ]