Rotel RB-1050 User's Manual
Contents
1. Owner s Manual Manuel d utilisation Bedienungsanleitung Manuale di Istruzioni Manual de Instrucciones Gebruiksaanwijzing RB 1050 Stereo Power Amplifier Amplificateur De Puissance St r o Stereo Endstufe Amplificatore di Potenza Etapa de Potencia Estereof nica Stereo Eindversterker eg oft CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL APPLICABLE FOR USA CANADA OR WHERE APPROVED FOR THE USAGE CAUTION TO PREVENT ELECTRIC SHOCK MATCH WIDE BLADE OF PLUG TO WIDE SLOT INSERT FULLY ATTENTION POUR EVITER LES CHOCS ELECTRIQUES INTRODUIRE LA LAME LA PLUS LARGE DE LA FICHE DANS LA BORNE CORRESPONDANTE DE LA PRISE ET POUSSER JUSQU AU FOND English Figure 1 Controls and Connections Commandes et branchements Bedienelemente und Anschl sse Controlli e collegamenti Controles y Conexiones De bedieningsorganen en aansluitingen o o o POWER O e q che LEVEL e W Can CAUTION SPEAKER IMPEDANCE 12V TRIGGER RISK OF ELECTRIC SHOCK 4 OHMS MINIMUM OD omis WARNING SHOCK HAZZARD DO NOT OPEN AGERER2. Few Precautions Placement AC Power and Control AC Power Input Power Switch JI and Power Indicator EI 12V Trigger Mode Selector 12V Trigger Input and Output EX Circuit Breakers ELI Protection Circuitry EM Clipping Indicators Input Signal Connections EI Front Panel Level Controls EJ Signal Output Link Connectors E Speaker Connection Speaker Selection Speaker Wire Selection Polarity and Phasing Speaker Connection EA Troubleshooting Front Panel Power Indicator Is Not Lit No Sound Protection Indicator Is Lit Specifications uU uU 0 0 U c c oc oc N N About Rotel A family whose passionate interest in music led them to manufacture high fidelity compo nents of uncompromising quality founded Rotel over 40 years ago Through the years that passion has remained undiminished and the family goal of providing exceptional value for audiophiles and music lovers regardless of their budget is shared by all Rotel employ ees The engineers work as a close team listen ing to and fine tuning each new product until it reaches their exacting musical standards They are free to choose components from around the world in order to make that product the best they can You are likely to find ca pacitors from the United Kingdom and Ger many semi cond
3. Plug in a pair of high quality RCA cables from your preamp into the amplifier inputs wire up your speakers and enjoy A Few Precautions Please read this manual carefully In addition to basic installation and operating instructions it provides valuable information on various RB 1050 system configurations as well as gen eral information that will help you get opti mum 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 1050 shipping carton and all en closed packing material for future use Ship ping or moving the RB 1050 in anything other than the original packing material may re sult in severe damage to your amplifier Fill out and send in the owner s registration card packed with the RB 1050 Also 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 Placement The RB 1050 generates heat as part of its nor mal operation The heat sinks and ventilation openings in the amplifier are designed to dissipate this heat The ventilation slots in the top cover must be open There should be 10 cm 4 inches of clearance around the chas sis and reasonable airflow through the in stallation location to prevent the amplifier from overheating Likewise remember the wei
4. positive negative orien tation of the connections for every speaker and amplifier connection must be consistent so all the speakers will be in phase If the po larity of one connection is mistakenly reversed bass output will be very weak and stereo im aging degraded All wire is marked so you can identify the two conductors There may be ribs or a stripe on the insulation of one conductor The wire may have clear insula tion with different color conductors copper and silver There may be polarity indications printed on the insulation Identify the positive and negative conductors and be consistent with every speaker and amplifier connection Speaker Connection EA The RB 1050 has two pairs of color coded binding posts on the back panel These con nectors accept bare wire connector lugs or dual banana type connectors except in the European Community countries where their use is not permitted Route the wire from the RB 1050 to the speak ers Give yourself enough slack so you can move the components enough to allow access to the speaker connectors If you are using dual banana plugs connect them to the wires and then plug into the backs of the binding posts The hexagonal thumb screws of the binding posts should be screwed in all the way clockwise If you are using terminal lugs connect them to the wires If you are attaching bare wires directly to the binding posts separate the wire conductors and strip back t
5. shut off the amplifier Typically this occurs only when the ventilation openings are blocked when there is faulty speaker wiring or after a period of extreme use Turn off the system and wait for the amp to cool Then push the front panel power switch in and out to reset the protec tion devices If the problem is not corrected or reoccurs there is a problem with the sys tem or the amplifier itself Specifications Continuous Power Output 20 20 kHz lt 0 03 8 ohms Total Harmonic Distortion 20Hz 20kHz 8 ohms Intermodulation Distortion 60 Hz 7 kHz 4 1 Frequency Response 1dB Damping Factor 20 20 000 Hz 8 ohms Speaker Impedance Normal mode Signal to Noise Ratio IHF A network Input Impedance Sensitivity Power Requirements Power Consumption Dimensions W x H x D Weight net All specifications are accurate at the time of printing Rotel reserves the right to make improvements without notice 70 watts ch lt 0 03 lt 0 03 10Hz 100kHz 500 4 ohms minimum 116 dB 33 k Ohms 1 0 volt 115 Volts 60 Hz U S version 230 Volts 50 Hz European version 250 Watts 430 x 92 x 350 mm 1615 16 x 35 8 x 1313 16 ins 8 1 kg 17 86 Ib 082 OMRB 1050 112000 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 97
6. this protection circuitry in action However should a faulty condition arise the amplifier will stop play ing and the LED indicator on the front panel will light up If this happens turn the amplifier off let it cool down for several minutes and attempt to iden tify and correct the problem that caused the protection circuitry to engage When you turn the amplifier back on the protection circuit will automatically reset and the indicator LED should go out In most cases the protection circuitry activates because of a fault condition such as shorted speaker wires or inadequate ventilation lead ing to an overheating condition In very rare cases highly reactive or extremely low im pedance speaker loads could cause the pro tection circuit to engage If the protection circuitry triggers repeatedly and you are unable to isolate and correct the faulty condition contact your authorized Rotel dealer for assistance in troubleshooting Clipping Indicators EJ Each channel has a Clipping Indicator on the front panel Clippping occurs when an am plifier it driven to the point it begins to pro duce distortion The term refers to the flattening or clipping of the musical waveform that occurs when an amplifier is driven beyond its rated power If the Clipping Indicators light reduce the volume level of the system Fail ure to so do could result in damage to the speakers connected to the amplifier It may also cause th
7. 8 664 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 www rotel com
8. KER AVIS RISQUE DE CHOCELECTRIQUE NE PAS OUVRIR SPEAKERS am a lane INPUT CHANNEL 2 CHANNEL 1 E CH2 CH1 4 ad CH1 WARNING TO REDUCE THE RISK ROTEL OF FIRE OR ELECTRICAL SHOCK DO NOT EXPOSE THIS EQUIPMENT ES MODEL NO RETOS TO RAIN OR MOISTURE 0 O Alice SY RE RF ER CONSUMPTION 250w SIGNAL OUTPUT LINK SERIAL NO Figure 2 Preamp Input and Speaker Output Connections Entr e pr amplificateur et sorties enceintes acoustiques Anschlufidiagramm Cinch Eing nge und Lautsprecher Collegamenti di ingresso dal preamplificatore e delle uscite dei diffusori Conexiones para la Se al de Entrada y Salidas para la Conexi n de las Cajas De aansluitingen naar de voorversterker en luidsprekerverbindingen PREAMPLIFIER PREAMP OUTPUTS SPEAKER ROTEL RB 1050 VS sw HCP On th ACGREAKER SIGNAL sense WARNING TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCK THIS EQUIPMENT nl ROTERE AN POWER AMPLIFIER MODEL NO nB 1050 POWER CONSUMPTION 280W SIGNAL OUTPUT un TO RAIN OR MOISTURE RB 1050 Stereo Power Amplifier 4 Contents Figure 1 Controls and Connections Figure 2 Preamp Input and Speaker Output Connections About Getting Started A A
9. be away from home for an extended period of time such as a month long vacation it is a sensible precaution to unplug your amplifier as well as other au dio and video components while you are away Power Switch and Power Indicator EJ The power switch is located on the front panel of your amplifier To turn the amplifier on 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 po sition Ei 12V Trigger Mode Selector The Amplifier provides the option for manual or automatic power on off operation These modes are selectable using a switch on the back panel NOTE The front panel Power Switch E must be ON for the automatic turn on sys tem to work When the switch is in the 12V TRIG posi tion the amplifier is turned on automatically when a 12V trigger signal is present at the 3 5 mm Jack of TRIGGER IN on the rear panel The amplifier will go into standby mode af ter a delay of 5 minutes if the 12V signal is not present When the switch is in the SIGNAL SENSE position the amplfier is turned on whenever an audio signal is applied to the Inputs If no audio signal is applied to the inputs the amplifier will return to standby mode after a delay of 5 minutes When the switch is in the OFF position the automatic activation system is turned off Only the front
10. e Protection Circuit to activate RB 1050 Stereo Power Amplifier 6 Input Signal Connections rs See Figure 2 The RB 1050 has conventional RCA type in put connectors the type found on nearly all audio equipment NOTE To prevent loud potentially damag ing noises make sure the amplifier is turned off when you make any changes to the input signal configuration Select high quality audio interconnect cables Connect each of the outputs from the pream plifier or signal processor to the correspond ing input of the RB 1050 Typically the left channel signal is connected to Channel 1 and the right channel signal is connected to Chan nel 2 Front Panel Level Controls EJ The Level controls on the front panel let you control the output volume of the RB 1050 In most systems these controls should be turned up all the way full clockwise position In some situations such as when the amplifier is part of a multi room or bi amplified speaker sys tem it may be necessary to reduce the out put level Use a small flat blade screwdriver to turn the controls down counterclockwise as needed Turning down the level does not reduce the maximum output of the amplifier It simply increases the input signal required to achieve maximum output power Signal Output Link Connectors EJ The input signal that is goes into the normal Inputs also goes to the Signal Output Link connectors This is typically used when the amplifier i
11. ght 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 com mon sense AC Power and Control AC Power Input IE Because of its high power rating the RB 1050 can draw considerable current Therefore it should be plugged directly into a 2 pin po larized wall outlet Do not use an extension cord A heavy duty multi tap power outlet strip may be used if it and the wall outlet is rated to handle the current demanded by the RB 1050 and all the other components con nected to it Be sure the Power Switch on the front panel of the RB 1050 is turned off in the out posi tion Then connect the supplied power cord to the Power Connector the back panel of the amplifier and to the AC power outlet Your RB 1050 is configured at the factory for the proper AC line voltage in the country where you purchased it either 115 volts AC or 230 volts AC with a line frequency of either 50 Hz or 60 Hz The AC line configuration is noted on a decal on the back panel Note Should you move your RB 1050 amplifier to another country it is possible to reconfigure your amplifier for use on a different line voltage Do not attempt to perform this conversion yourself Opening the enclosure of the RB 1050 exposes you to dangerous voltages Consult a qualified service person or the Rotel factory service department for information If you are going to
12. he insulation from the end of each conductor Be careful not to cut into the wire strands Unscrew turn coun terclockwise the binding post hexagonal thumbscrews Place the connector lug or wire around the binding post shaft Turn the hex agonal thumbscrews clockwise to clamp the connector lug or wire firmly in place NOTE Be sure there are no loose wire strands that could touch adjacent wires or connectors Troubleshooting Most difficulties in audio systems are the re sult of poor or wrong connections or improper control settings If you encounter problems isolate the area of the difficulty check the con trol settings determine the cause of the fault and make the necessary changes If you are unable to get sound from the RB 1050 refer to the suggestions for the following conditions Front Panel Power Indicator Is Not Lit No main power to the RB 1050 Check the front panel power switch Make sure that it is set to the On position Check AC power con nections at the amplifier and the AC outlet English No Sound If the amp is getting AC power but is pro ducing no sound check the Protection indi cator on the front panel If it is lit see below Also check the front panel Level Controls to see if they are turned up Then check all of your connections and control settings on as sociated components Protection Indicator Is Lit The front panel indicator lights when the RB 1050 protection circuits have
13. panel Power Switch will control the amplifier 12V Trigger Input and Output EI The jack labeled IN is for connecting the 3 5mm Plug Cable carrying a 12 volt trig ger signal to turn the amplifier on and off To use this feature the front panel Power Switch must be set to the ON position This input ac cepts any control signal AC or DC ranging from 3 volts to 30 volts The jack labeled OUT is for connecting an other 3 5mm plug cable to provide a 12V trigger signal to other components The 12V output signal is available whenever a 1 2 volt trigger signal is applied to the IN connector 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 To reset the circuit breaker press the button Should it repeatedly open contact your authorized Rotel dealer for troubleshooting assistance Protection Circuitry Ed The RB 1050 features a thermal protection cir cuit that protects the amplifier against potential damage in the event of extreme or faulty operating conditions Unlike many designs the RB 1050 s protection circuit is indepen dent 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 tem peratures exceed safe limits Most likely you will never see
14. s part of a multi room system The signal from the Signal Output Link is then used to provide a signal to the other amplifiers in the system Speaker Connection Speaker Selection We recommend using loudspeakers with a nominal impedance of 4 ohms or higher with the RB 1050 You should exercise some cau tion in driving multiple pairs of speakers in parallel configuration because the effective impedance the amplifier sees is cut in half For example when driving two pair of 8 ohm speakers the amplifier sees a 4 ohm load When driving multiple speakers in parallel it is recommended that you select speakers with a nominal impedance of 8 ohms or higher Speaker impedance ratings are less than precise In practice very few loudspeakers will present any problems for the RB 1050 See your authorized Rotel dealer if you have any questions Speaker Wire Selection Use insulated two conductor stranded wire to connect the RB 1050 to the speakers The size and quality of the wire can have an audible effect on the performance of the system Stan dard speaker wire will work but can result in lower output or diminished bass response particularly over longer distances In general heavier wire will improve the sound For best performance you may want to consider spe cial high quality speaker cables Your autho rized Rotel dealer can help in the selection of appropriate cables for your system Polarity and Phasing The polarity the
15. uctors from Japan or the United States while toroidal power transform ers are manufactured in Rotel s own factory Rotel s reputation for excellence has been earned through hundreds of good reviews and awards from the most respected reviewers in the industry who listen to music every day Their comments keep the company true to its goal the pursuit of equipment that is musi cal reliable and affordable All of us at Rotel thank you for buying this product and hope it will bring you many hours of enjoyment Getting Started Thank you for purchasing the Rotel RB 1050 Stereo Power Amplifier When used in a high quality music or home theater system your Rotel amplifier will provide years of musical enjoyment The RB 1050 is a high power two channel power amplifier providing the highest level of audio performance Discrete output devices a massive power supply premium components and Rotel s Balanced Design ensure superb sound quality High current capability allows the RB 1050 to drive the most demanding loud speakers Be aware that the RB 1050 is capable of high power levels in excess of 70 watts per channel Make sure that your speakers can handle the power of the RB 1050 If in doubt about your speakers ask your local Rotel audio dealer for advice The RB 1050 is straightforward in its instal lation and operation If you have experience with other stereo power amplifiers you shouldn t find anything perplexing
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