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Rotel RB-971 Home Cinema Amplifier, size: 222 KB
User reviews and opinions
|Cremmator||9:46am on Sunday, August 15th, 2010|
|Not good for G5 Mac! Before buying any WD Raptor high performance hard drives for use in a Mac G5...|
|Brounfr||10:18am on Tuesday, June 29th, 2010|
|This machine is a dream come true for anyone who uses the computer alot. very fast and reliable Bit expensive!|
|Lubos Ondejcik||1:27pm on Tuesday, June 22nd, 2010|
|guys stop with the noob comments. THIS PC IS NOT FOR GAMING OK. like InsaniTech Computers. Wish it would come with a Vista backup disk, would be really cool to be able to work with DX10 on this computer.|
|gamedudex||9:59am on Monday, May 17th, 2010|
|Amazing is the only word. The only problem I have with it is that World of Warcraft can just barely be played on it :( Other than that, its amazing!|
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STEREO POWER AMPLIFIER AMPLIFICATEUR DE PUISSANCE STRO STEREO-ENDSTUFE FINALE DI POTENZA STEREO ETAPA DE POTENCIA ESTEREOFONICA
Owners Manual Guide dutilisation Bedienungsanleitung Manuale di Istruzioni Manual de Instrucciones
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.
WARNING: There are no user serviceable parts inside. Refer all servicing to qualified service personnel. WARNING: To reduce the risk of fire or electrical 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 instructions before connecting or operating the unit. Keep this manual so you can refer to these safety instructions. Heed all warnings and safety information in these instructions and on the product itself. Follow all operating instructions. Clean the unit only with a dry cloth or a vacuum cleaner. Keep the ventilation inlets on the unit unobstructed. For example, do not place the unit on a bed, sofa, rug, or similar surface that could block the ventilation slots. If the unit is placed in a bookcase or cabinet, there must be sufficient clearance around the unit and ventilation of the cabinet to allow proper cooling. Keep the unit away from radiators, heat registers, stoves, or any other appliance that produces heat.
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.
This symbol is to alert the user to the presence of uninsulated dangerous voltages inside the product's enclosure that may constitute a risk of electric shock.
This symbol is to alert the user to important operating and maintenance (service) instructions in this manual and literature accompanying the product.
The unit must be connected to a power supply only of the type and voltage specified on the rear panel of the unit.
Connect the unit to the power outlet only with the supplied 2-pin polarized power supply cable or an exact equivalent. Do not modify the supplied cable in any way. Do not attempt to defeat grounding and/or polarization provisions. The cable should be connected to a 2-pin polarized wall outlet, matching the wide blade of the plug to the wide slot of the receptacle. Do not use extension cords. Do not route the power cord where it will be crushed, pinched, bent at severe angles, exposed to heat, or damaged in any way. Pay particular attention to the power cord at the plug and where it exits the back of the unit. The power cord should be unplugged from the wall outlet if the unit is to be left unused for a long period of time. Immediately stop using the unit and have it inspected and/or serviced by a qualified service agency if: The power supply cord or plug has been damaged. Objects have fallen, or liquid has been spilled, into the unit. The unit has been exposed to rain. The unit shows signs of improper operation The unit has been dropped or damaged in any way Place the unit on a fixed, level surface strong enough to support its weight. Do not place the unit on a moveable cart that could tip over.
STEREO POWER AMPLIFIER RB-971
Controls and Connections Commandes et branchements Bedienelemente und Anschlsse Controlli e collegamenti Controles y Conexiones
WARNING:TO REDUCE THE RISK OF FIRE
OR ELECTRICAL SHOCK, DO NOT EXPOSE
STEREO 4 OHMS MINIMUM BRIDGED 8 OHMS MINIMUM
RISK OF ELECTRIC SHOCK DO NOT OPEN AVIS: RISQUE DE CHOC ELECTRIQUENE PAS OUVRIR
POWER AMPLIFIER MODEL NO. RB-971 POWER CONSUMPTION: 250W
THIS EQUIPMENT TO RAIN OR MOISTURE.
SPEAKERS RIGHT RIGHT INPUT LEFT LEFT INPUT
Stereo Connections Inputs and Speakers Branchements des entres et des enceintes en mode stro Anschludiagramm bei Stereobetrieb - Eingnge und Lautsprecher Collegamenti stereo - Ingressi e diffusori Conexiones para el Funcionamiento en Modo Estereofnico - Terminales de Entrada y de Conexin a las Cajas Acsticas
PREAMPLIFIER / PRAMPLIFICATEUR / VORVERSTRKER / PREAMPLIFICADOR
Bridged Mono Connections Inputs and Speakers Branchements des entres et des enceintes en pont mode mono Anschludiagramm bei Brckenschaltung - Eingnge und Lautsprecher Collegamenti mono configurazione a ponte - Ingressi e diffusori Conexiones para el Funcionamiento en Modo Monofnico Puenteado -Terminales de Entrada y de Conexin a las Cajas Acsticas
Jumper Locations Emplacement des Cavaliers Jumperpositionen Le posizioni dei ponticelli Ubicaciones de los Puentes
Contents (circled numbers refer to illustration)
About Rotel __________________________________________ 1 Getting Started ______________________________________ 2 A Few Precautions Placement AC Power Input Power Switch
A family whose passionate interest in music led them to manufacture high fidelity components of uncompromising quality founded Rotel over 30 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 employees. The engineers work as a close team, listening 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 capacitors from the United Kingdom and Germany, semi conductors from Japan or the United States, while toroidal power transformers are manufactured in Rotels own factory. Rotels 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 musical, reliable and affordable. All of us at Rotel thank you for buying this product and hope it will bring you many hours of enjoyment.
AC Power and Control ________________________________ 2
and Power Indicator
Input Signal Connection ______________________________ 3 Input Signal Connection 4 Speaker Selection Speaker Wire Selection Polarity and Phasing Stereo Speaker Connection
Speaker Connection __________________________________ 3
Bridged Mono Operation ______________________________ 4 Bridged Mono Indicator Light Resetting Jumpers Input Connection Bridged Speaker Connection Front Panel Power Indicator Is Not Lit Fuse Replacement No Sound
Troubleshooting ______________________________________ 4
Specifications _______________________________________ 25
Thank you for purchasing the Rotel RB-971 Stereo Power Amplifier. When used in a high-quality music or home theater system, it provide years of musical enjoyment. The RB-971 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 Rotels Balanced Design ensure superb sound quality. High current capability allows the RB-971 to drive the most demanding loudspeakers. Be aware that the RB-971 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-971. If in doubt about your speakers, ask your local Rotel audio retailer for advice. The RB-971 is straightforward in its installation and operation. If you have experience with other stereo power amplifiers, you shouldnt find anything perplexing. Plug in a pair of high-quality RCA cables from your preamp into the amplifier inputs, wire up your speakers, and enjoy.
AC Power and Control
AC Power Input
Because of its high power rating, the RB-971 can draw considerable current. Therefore, it should be plugged directly into a 2-pin polarized 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-971 and all the other components connected to it. Be sure the power switch on the front panel of the RB-971 is turned off (in the out position). Then, connect the supplied power cord to the AC power outlet. Your RB-971 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.
A Few Precautions
Please read this manual carefully. In addition to basic installation and operating instructions, it provides valuable information on various RB-971 system configurations as well as general information that will help you get optimum performance from your system. Please contact your authorized Rotel audio retailer for answers to any questions you might have. In addition, all of us at Rotel welcome your questions and comments. Save the RB-971 shipping carton and all enclosed packing material for future use. Shipping or moving the RB-971 in anything other than the original packing material may result in severe damage to your amplifier. Fill out and send in the owners registration card packed with the RB-971. 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.
Note: Should you move your RB-971 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-971 exposes you to dangerous voltages. Consult a qualified service person or the Rotel factory service department for information.
If you are going to 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 audio and video components) while you are away.
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 position.
Because of its high power output, the RB-971 may generate considerable heat. The heat sinks and ventilation openings in the amplifier are more than capable of dissipating this heat under normal conditions, but dont smother your amplifier. There must be adequate clearance around the chassis. The ventilation slots in the top cover must be unblocked, and there must be reasonable airflow around the amplifier. Use common sense when placing the amplifier in a cabinet or when stacking other equipment. Likewise, remember the weight of the amplifier when you select an installation location. Make sure that the shelf or cabinet can support its considerable bulk. Again, use common sense.
Polarity and Phasing
The polarity the positive/negative orientation of the connections for every speaker and amplifier connection must be consistent so all the speakers will be in phase. If the polarity of one connection is mistakenly reversed, bass output will be very weak and stereo imaging 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 insulation 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.
Input Signal Connection
[See Figure 2 for normal stereo wiring illustration.] The RB-971 has conventional RCA type input connectors, the type found on nearly all audio equipment.
Note: To prevent loud noises that neither you nor your speakers will appreciate, make sure the amplifier is turned off when you make any signal connections.
Select a high quality pair of audio interconnect cables. Connect the left channel output of your preamp to the left channel input on the RB-971. Connect the right channel output of your preamp to the right channel input.
Stereo Speaker Connection
The RB-971 has two pairs of color coded binding posts on the back panel. These connectors 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-971 to the speakers. 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 thumbscrews 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 the insulation from the end of each conductor. Be careful not to cut into the wire strands. Unscrew (turn counterclockwise) the binding post hexagonal thumbscrews. Place the connector lug or wire around the binding post shaft. Turn the hexagonal 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.
We recommend using loudspeakers with a nominal impedance of 4 ohms or higher with the RB-971. You should exercise some caution 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-971. See your Rotel audio retailer if you have any questions.
Speaker Wire Selection
Use insulated two-conductor stranded wire to connect the RB-971 to the speakers. The size and quality of the wire can have an audible effect on the performance of the system. Standard 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 special high-quality speaker cables. Your Rotel audio retailer can help in the selection of appropriate cables for your system.
Bridged Mono Operation
[See Figure 3 for bridged operation jumper setting and connection illustration.] The two channels of the RB-971 can be bridged. In this configuration the single channel produces a massive 200 watts! This feature allows you to increase the overall power output of your system by bridging the RB-971 and adding a second bridged RB971. Or the RB-971 is bridged to drive a monophonic subwoofer. Note however that when the RB-971 is bridged the speaker connected to it must have an impedance of 8 ohms or more. In order to use the RB-971 in bridged mode, three jumper connectors inside the amplifier must be moved from one set of pins to another. This task should be done by a qualified technician. See your Rotel audio retailer. In addition the RB-971 is connected to the other components in a different way. When the RB-971 is setup for bridged operation the Bridged Mono indicator light on the front panel will light. 3
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-971, refer to the suggestions for the following conditions:
Front Panel Power Indicator Is Not Lit
No main power to the RB-971. Check the front panel power switch. Make sure that it is set to the on position. Check AC power connections at the amplifier and the AC outlet.
If everything checks out correctly and you still cannot get the amplifier to turn on, the internal power fuse may have blown. If you believe this has happened, contact your Rotel dealer for information on where to take your amplifier to get the fuse replaced.
Before opening the RB-971 cabinet to reset the jumpers, the power cord must be unplugged from the wall. DO NOT OPEN THE CABINET OF THE RB-971 BEFORE THE POWER CORD HAS BEEN UNPLUGGED FROM THE WALL. FAILURE TO DO SO WILL EXPOSE YOU TO HAZARDOUS VOLTAGES.
After the power cord has been unplugged, remove the screws that hold the cabinet cover in place and slide the cover off the amplifier. Locate the three jumper pin blocks labeled S 601, S 602 and S 603. The factory standard (stereo) position of the jumpers is on pins 1 and 2 of each block. There is a * mark on the circuit board next to this position. To convert the RB-971 to bridged mono move all three jumpers so they are on pins 2 and 3 of each jumper pin block. Replace the cover of the cabinet. Do not plug the RB971 power cord back into the wall outlet until the cabinet cover has been replaced.
If the amp is getting AC power, but is producing no sound. 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. Check all of your connections and control settings on associated components. Pay particular attention to the speaker wire connections. Push the front panel power switch in. If the problem is not corrected or reoccurs, there is a problem with the system or the amplifier itself.
When using the RB-971 in bridged mono mode, connect the cable from the preamplifier output to the left input. No connection is made to the right input.
Bridged Speaker Connection
When using the RB-971 in bridged mono mode, the wire to the speakers is connected to the positive terminals of the left and right channels. Connect the wire that goes to the positive terminal of the speaker to the positive terminal of the left channel of the RB-971. Connect the wire that goes to the negative terminal of the speaker to the positive terminal of the right channel of the RB-971. No connections are made to the negative terminals of the RB-971.
Rotel of America
54 Concord Street North Reading, MA 01864-2699 USA Phone: +1 978-664-3820 Fax: +1 978-664-4109
Meadow Road Worthing, West Sussex BN11 2RX England Phone: +44 1903-524-813 Fax: +44 1903-524-831
Kleine Heide 12 D-33790 Halle/Westf. Germany Phone: +49 5201-87170 Fax: +49 5201-73370
082 OMRB-971 110498
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