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Owner’s Manual
RB-951 MkII
Stereo Power Amplifier
POWER AMPLIFIER RB-951 MkII
CH1 CH2
PROTECTION
POWER BRIDGED
MONO
CLIPPING
LEVEL LEVEL
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RB-951 MkII Stereo Power Amplifier 2 English 1: Controls, Connections, & Internal Jumpers POWER AMPLIFIER RB-951 MkII CH1 CH2 PROTECTION POWER BRIDGED MONO CLIPPING LEVEL LEVEL 1 2 3 4 5 6 7 8 9 10 12 TRIG IN SIGNAL SENSE CAUTION STEREO: 4 OHMS MINIMUM RISK OF ELECTRIC SHOCK DO NOT OPEN BRIDGED: 8 OHMS MINIMUM 10 A AVIS: RISQUE DE CHOC ELECTRIQUE–NE PAS OUVRIR SPEAKERS OFF AC BREAKER CHANNEL 2 CHANNEL 1 INPUT WARNING: TO REDUCE THE RISK CH2 CH1 CH2 CH1 OF FIRE OR ELECTRICAL POWER AMPLIFIER SHO
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3 2: Hookup (Stereo or Parallel Mono modes) RCA OUTPUTS R L 12 TRIG IN SIGNAL SENSE CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN 10 A AVIS: RISQUE DE CHOC ELECTRIQUE–NE PAS OUVRIR SPEAKERS OFF AC BREAKER CHANNEL 2 CHANNEL 1 INPUT WARNING: TO REDUCE THE RISK CH2 CH1 CH2 CH1 OF FIRE OR ELECTRICAL POWER AMPLIFIER SHOCK, DO NOT EXPOSE MODEL NO. RB-951 MkII THIS EQUIPMENT TO RAIN POWER CONSUMPTION: 200W OR MOISTURE. BRIDGED NORMAL SIGNAL OUTPUT BRIDGED RB-951 MkII MONO STERO LINK
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RB-951 MkII Stereo Power Amplifier 4 3: Hookup (Bridged Mono mode) RCA OUTPUTS R L 12 TRIG IN SIGNAL SENSE CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN 10 A AVIS: RISQUE DE CHOC ELECTRIQUE–NE PAS OUVRIR SPEAKERS OFF AC BREAKER CHANNEL 2 CHANNEL 1 INPUT WARNING: TO REDUCE THE RISK CH2 CH1 CH2 CH1 OF FIRE OR ELECTRICAL POWER AMPLIFIER SHOCK, DO NOT EXPOSE MODEL NO. RB-951 MkII THIS EQUIPMENT TO RAIN POWER CONSUMPTION: 200W OR MOISTURE. BRIDGED NORMAL SIGNAL OUTPUT BRIDGED RB-951 MkII MONO STERO LI
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5 English 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. If the unit is exposed to moisture, or a foreign object gets into the enclosure, immediately disconnect the power cord from the wall. Take the unit to a qualified service person for inspection and necessary repairs. Read all the
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RB-951 MkII Stereo Power Amplifier 6 Speakers ................................................9 Contents About Rotel Speaker Selection 9 1: Controls, Connections, & Internal Jumpers 2 A family whose passionate interest in music Speaker Wire Selection 9 led them to manufacture high fidelity compo- 2: Hookup (Stereo or Parallel Mono modes) 3 Polarity and Phasing 9 nents of uncompromising quality founded Rotel 3: Hookup (Bridged Mono mode) 4 over 30 years ago. Over the years that pas- Speaker Conne
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7 English Placement Power Switch and Indicator Getting Started The RB-951MkII generates heat as part of its The power switch is located on the left side Thank you for purchasing the Rotel RB-951MkII normal operation. The heat sinks and ventila- of the front panel. To turn the amplifier on (or Stereo Power Amplifier. When used in a high- tion openings in the amplifier are designed to activate either of the optional automatic quality music or home theater system, your Rotel to dissipate this heat
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RB-951 MkII Stereo Power Amplifier 8 12V Trigger Input In most cases, the protection circuitry activates Signal Connections because of a fault condition such as shorted A pair of screw terminals for connecting the speaker wires, or inadequate ventilation lead- wires carrying a +12 volt trigger signal to turn The RB-951MkII provides standard conventional ing to an overheating condition. In very rare the amplifier on and off, such as might be used input connections — unbalanced RCA type cases, hig
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9 English Clipping Indicators Speaker Wire Selection If you are using banana plugs, connect them to the wires and then plug into the backs of Two front panel LEDs (one for each channel) Use insulated two-conductor stranded wire to the speaker connectors. The collars of the flash to indicate when the amplifier is “clip- connect the RB-951MkII to the speakers. The speaker connectors should be screwed in all ping” or being asked to deliver more output size and quality of the wire can have an au- th
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RB-951 MkII Stereo Power Amplifier 10 Input Sensitivity Internal Jumper Settings Troubleshooting (S605 and S606) Jumper blocks S605 and S606 are used to Most difficulties in audio systems are the re- for Custom Installation set the input sensitivity of the amplifier. sult of poor or wrong connections, or improper (see figure 1) control settings. If you encounter problems, For high sensitivity (0.775v input for isolate the area of the difficulty, check the control There are internal jumpers that
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11 English Specifications Continuous Power Output Stereo Mode (20-20 kHz, < 0.03% THD) 50 watts/ch into 8 ohms Continuous Power Output Bridged Mono Mode (20-20 kHz, < 0.1% THD) 150 watts/ch into 8 ohms Total Harmonic Distortion (20Hz-20kHz, 8 ohms) < 0.03% Intermodulation Distortion (60 Hz : 7 kHz, 4:1) < 0.03% Frequency Response (±1 dB) 15Hz-100kHz Damping Factor (20-20,000 Hz, 8 ohms) 280 Speaker Impedance (combined load) Stereo mode: 4 ohms minimum Bridged Mono mode: 8 ohms minimum Parallel M
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The Rotel Co. Ltd. 10-10 Shinsen-Cho Shibuya-Ku Tokyo 150-0045 Japan Phone: +81 3-5458-5325 Fax: +81 3-5458-5310 Rotel of America 54 Concord Street North Reading, MA 01864-2699 USA Phone: +1 978-664-3820 Fax: +1 978-664-4109 Rotel Europe Meadow Road Worthing, West Sussex BN11 2RX England Phone: +44 (0)1903 524 813 Fax: +44 (0)1903 524 831 Rotel Deutschland Kleine Heide 12 D-33790 Halle/Westf. Germany Phone: +49 05201-87170 Fax: +49 05201-73370 082 OMRB-951MkII 113099
