RB1552 MkII - Receiver ROTEL - Free user manual and instructions

USER MANUAL RB1552 MkII ROTEL

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 expose the unit to dripping or splashing. Do not place objects filled with liquids, such as vases, on the unit. 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 component. 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 enclosure only with a dry cloth or a vacuum cleaner. Do not use this unit near water. You must allow a minimum 10 cm or 4 inches of unobstructed clearance around the unit. Do not place the unit on a bed, sofa, rug, or similar surface that could block the ventilation openings. If the unit is placed in a bookcase or cabinet, there must be ventilation of the cabinet to allow proper cooling. Keep the component away from radiators, heat registers, stoves, or any other appliance that produces heat. Rotel products are designed to comply with international directives on the Restriction of Hazardous Substances (RoHS) in electrical and electronic equipment and the disposal of Waste Electrical and Electronic Equipment (WEEE). The crossed wheelie bin symbol indicates compliance and that the products must be appropriately recycled or processed in accordance with these directives. Important Safety Instructions

WARNING: The rear panel power cord connector is the mains power

disconnect device. The device must be located in an open area that allows access to the cord connector. The unit must be connected to a power supply only of the type and voltage specified on the rear panel. (USA: 120V/60Hz, EC: 230V/50Hz) Connect the component to the power outlet only with the supplied power supply cable or an exact equivalent. Do not modify the supplied cable. A polarized plug has two blades, with one wider than the other. A grounding plug has two blades plus a third grounding prong. These are provided for your safety. Do not defeat grounding and/or polarization safety provisions. If the supplied plug does not fit your outlet, please consult an electrician for replacement of the obsolete outlet. Do not use extension cords. The main plug of the power cordset is a disconnect device of the apparatus. In order to completely disconnect the apparatus from the supply mains, the main plug of the power cordset should be unplugged from the mains (AC) outlet. The stand-by LED indicator will not be lit up to show the power cord is unplugged. The disconnect device shall remain readily operable. Do not route the power cord where it will be crushed, pinched, bent, exposed to heat, or damaged in any way. Pay particular attention to the power cord at the plug and where the cord exits the back of the unit. The power cord should be unplugged from the wall outlet during a lightning storm or if the unit is to be left unused for a long period of time. This apparatus shall be connected to a main socket outlet with a protective earth connection. Use only accessories specified by the manufacturer. Use only with a cart, stand, rack, bracket or shelf system recommended by Rotel. Use caution when moving the unit in a stand or rack to avoid injury from a tip-over. Use Class 2 wiring for speaker connections to ensure proper insulation and minimize the risk of electric shock. Immediately stop using the component 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 RB-1582MKII For RB-1552MKII only: This symbol means that this unit is double insulated. An earth connection is not required.

Power Switch and Power Indicator

12 Volt Trigger Input and Output

Input Signal Connections

Speaker Connection .................................................9 Speaker Selection 9 Speaker Wire Selection 9 Polarity and Phasing 9 Speaker Connections

No Sound 10 Protection Indicator is Illuminated 10 Specifications .....................................................108 RB-1552MKII/RB-1582MKII Stereo Power Amplifiers superb sound quality. High current capability allow the RB-1552MKII and RB-1582MKII to drive the most demanding loudspeakers.Be aware that the RB-1552MKII and RB-1582MKII are capable of high power levels, in excess of 130 watts and 200 watts respectively per channel. Make sure that your speakers can handle the power of the amplifier. If in doubt about your speakers, ask your local Rotel audio dealer for advice.These amplifiers are straightforward in their installation and operation. If you have experience with other stereo power amplifiers, you shouldn’t find anything perplexing. Simply plug in the associated components and enjoy. A Few Precautions WARNING: To avoid potential damage to your system, turn off ALL the components in the system when connecting or disconnecting the loudspeakers or any associated components. Do not turn the system components back on until you are sure all the connections are correct and secure. Pay particular attention to the speaker wires. There must be no loose strands that could contact the other speaker wires, or the chassis of the amplifier.Please read this manual carefully. In addition to installation and operating instructions, it provides valuable information on various 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. In addition, all of us at Rotel welcome your questions and comments.Save the shipping carton and all enclosed packing material for future use. Shipping or moving the amplifier in anything other than the original packing material may result in severe damage that is not covered by the warranty.If included in the box please fill out and send in the owner`s registration card. 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 required. Placement The RB-1552MKII and RB-1582MKII generate heat as part of its normal 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 chassis, and reasonable airflow through the installation location, to prevent the amplifier from overheating.Remember the weight of the amplifier when you select an installation location. Make sure that the shelf or cabinet can support it. We recommend installing the unit in furniture designed to house audio components. Such furniture is designed to reduce or suppress vibration which can adversely affect sound quality. Ask your authorized Rotel dealer for advice about component furniture and proper installation of audio components. AC Power and Control AC Power Input

Your amplifier is configured at the factory for the proper AC voltage in the country where you purchased it, either 120 volts or 230 volts. The AC line configuration is noted on a decal on the back panel. NOTE: Should you move your amplifier to another country, it may be possible to reconfigure it for use on a different line voltage. Do not attempt to perform this conversion yourself. Opening the enclosure of the amplifier exposes you to dangerous voltages. Consult a qualified service person or the Rotel factory service department for information. NOTE: Some products are intended for sale in more than one country and as such are supplied with more than one AC cord. Please only use the one appropriate for your country/region. Because of its high power rating, the amplifier can draw considerable current. Therefore, it should be plugged directly into a wall outlet. The RB-1582MKII must be plugged into a 3-pin polarized outlet. The RB-1552MKII may be plugged into either a 2-pin or a 3-pin 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 amplifier and all the other components connected to it.Be sure the POWER SWITCH 1 on the front panel of the amplifier is turned off (in the “out” position). Then, connect the supplied power cord to the Power Connector 8 on the rear of the unit and the AC power outlet. 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. Power Switch and Power Indicator

The power switch is located on the front panel of your amplifier. To turn the amplifier on, push the switch in. The ring around the switch will light up, indicating that the amplifier is turned on. To turn the amplifier off, push the button again and return it to the “out” position.NOTE: Place the self adhesive ring over the light surrounding the power switch if the blue light is too bright. Trigger ON/OFF Mode Selector

The amplifier provides the option for manual or automatic power on/off operation. These modes are selectable using a toggle switch on the back panel.With the switch in the +12V TRIGGER ON position, 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 if the +12V 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. 12 Volt Trigger Input and Output

The jack labeled IN is for connecting the 3.5mm Plug/Cable carrying a +12 volt trigger signal to turn the amplifier on and off. To use this feature the toggle switch must be set to the ON position. This input accepts any control signal (AC or DC) ranging from 3 volts to 30 volts. The jack labeled OUT is for connecting another 3.5mm plug/cable to provide a 12V trigger signal to other components. The 12V output signal is available whenever a +12 volt trigger signal is applied to the IN connector. Protection Circuitry

The RB-1552MKII and RB-1582MKII feature thermal and over-current protection circuits that protect against potential damage in the event of extreme or faulty operating conditions. Unlike many designs, these protection9 circuits are independent of the audio signal and have no impact on sonic performance. Instead, the protection circuits monitor the temperature of the output devices and the current they are handling and shut down the amplifier if operating conditions exceed safe limits. Most likely, you will never see this protection circuitry in action. However, should a faulty condition arise, the amplifier will stop playing 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 identify and correct the problem. 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 leading to an overheating condition. In very rare cases, highly reactive or extremely low impedance speaker loads could cause the protection 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 Input Signal Connections

See figure 2 and 3 NOTE: To prevent loud potentially damaging noises, make sure the amplifier is turned off when you make any changes to the input signal configuration. The RB-1552MKII and RB-1582MKII have conventional RCA type input connectors, the type found on nearly all audio equipment, and accept Balanced (XLR) input connectors. Select high quality audio interconnect cables. Connect each of the outputs from the preamplifier or signal processor to the corresponding input of the amplifier. Input Selector Switch

A toggle switch in the rear panel selects the type of input signal to use. Select the correct inputs to use with this flip switch. NOTE: You should choose only one method of ananlog connection from a source component to the amplifier. Do not connect both the RCA and XLR outputs of a source component to the same amplifier at the same time. Speaker Connection Speaker Selection We recommend using loudspeakers with a nominal impedance of 4 ohms or higher with the RB-1552MKII and RB-1582MKII. 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-1552MKII or RB-1582MKII. See your authorized Rotel dealer if you have any questions. Speaker Wire Selection Use insulated two-conductor stranded wire to connect the amplifier 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 authorized Rotel dealer can help in the selection of cables for your system. 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 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. Speaker Connections

NOTE: The following text describes both binding post and plug-in connections. DO NOT use both connection methods in combination to connect multiple speakers. Turn off all the components in the system before connecting the speakers. The RB-1552MKII and RB-1582MKII have four pairs of color coded binding posts, two for each channel. 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 amplifier to the speakers. Give yourself enough slack so you can move the components 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 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 the insulation from the end of each conductor. Be careful not to cut into the wire strands. Unscrew (turn counterclockwise) the binding post. Place the connector lug or wire around the binding post shaft. Turn the binding post 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.10 RB-1552MKII/RB-1582MKII Stereo Power Amplifiers Specifications RB-1552MKII Continuous Power Output 130 watts/channel (20-20kHz, < 0.03%, 8 ohms)Total Harmonic Distortion (20Hz-20kHz, 8 ohms) < 0.03%Intermodulation Distortion (60Hz : 7kHz, 4:1) < 0.03%Frequency Response (±0.5dB) 10Hz - 100kHzDamping Factor (20-20,000Hz, 8 ohms) 450Speaker Impedance 4 Ohms minimum Signal to Noise Ratio (IHF A network) 120 dB Input Impedance/Sensitivity Unbalanced 12k Ohms/1.5 volt Balanced 100k Ohms/2.5 voltGain Unbalanced 26.5 dB Balanced 22.5 dBPower Requirements U.S. version 120 Volts, 60 Hz European version 230 Volts, 50 HzPower Consumption 400 WattsDimensions Width x Height x Depth 431 x 144 x 339 mm 17 x 5 /8 x 13 /8 ins. Front Panel Height 3U / 132.6mm / 5 /4 ins.Weight (net) 12.4kg / 27.27 lbs. RB-1582MKII Continuous Power Output 200 watts/channel, (20-20kHz, < 0.03%, 8 ohms)Total Harmonic Distortion (20Hz-20kHz, 8 ohms) < 0.03%Intermodulation Distortion (60Hz : 7kHz, 4:1) < 0.03%Frequency Response (±0.5dB) 10Hz - 100kHzDamping Factor (20-20,000Hz, 8 ohms) 800Speaker Impedance 4 ohms minimum Signal to Noise Ratio (IHF A network) 116 dB Input Impedance/Sensitivity Unbalanced 12k Ohms/1.9 volt Balanced 100k Ohms/3.0 volt Gain Unbalanced 26.5 dB Balanced 22.5 dBPower Requirements U.S. version 120 Volts, 60 Hz European version 230 Volts, 50 HzPower Consumption 550 WattsDimensions Width x Height x Depth 431 x 144 x 407 mm 17 x 5 /8 x 16 ins. Front Panel Height 3U / 132.6mm / 5 /4 ins.Weight (net) 17.6kg / 38.80 lbs.All specifications are accurate at the time of printing.Rotel reserves the right to make improvements without notice.Rotel and the Rotel HiFi logo are registered trademarks of The Rotel Co, Ltd., Tokyo, Japan. Troubleshooting Most difficulties in audio systems are the result of incorrect 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 amplifier, refer to the suggestions for the following conditions: Power Indicator Is Not Illuminated No main power to the amplifier. 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. Fuse Replacement

RB-1582MKII Only If everything checks out correctly and you still cannot get the amplifier to turn on, check for a blown fuse. Disconnect the AC from the wall and remove the fuse holder