RC-1550

STANDBY

RECORDING

MEDIA PLAYER

LISTENING

CD AUX TAPE 1 TAPE 2

TREBLE

BALANCE

TUNER PHONO

CD AUX

TUNER PHONO TAPE1

ON PHONES
Stereo Control Amplifier Pramplificateur stro Stereo-Vorverstrker Preamplificador Estereofnico Stereo Voorversterker Preamplificatore Stereo Stereokontrollfrstrkare
Owners Manual Manuel de lutilisateur Bedienungsanleitung Manual de Instrucciones Gebruiksaanwijzing Manuale di istruzioni Instruktionsbok
Important Safety Instructions
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. WARNING: The rear panel power cord connector is the mains power disconnect device. The apparatus 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: 120 V/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. 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. 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
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. This symbol means that this unit is double insulated. An earth connection is not required.
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.

Notas Importantes

Bij het maken van de verbindingen: 4 Zorg dat niet alleen dit apparaat, maar de gehele installatie uitstaat, als nog niet alle verbindingen gemaakt zijn. 4 Zorg dat niet alleen dit apparaat, maar de gehele installatie ook uitstaat, als u verbindingen gaat wijzigen. Wij raden u ook aan om 4 de hoofdvolumeregelaar van de installatie geheel dicht te draaien (volkomen naar links) wanneer u uw eindversterker aan- of uitzet.

Hl belangrijk:

Quando effettuate i collegamenti assicuratevi di: 4 Spegnere tutti i componenti del sistema prima di collegare qualsiasi componente, inclusi i diffusori. 4 Spegnere tutti i componenti del sistema prima di modificare qualsiasi connessione nel sistema. Vi raccomandiamo inoltre di: 4 Portare il volume a zero prima di accendere o spegnere lamplificatore.

Note importanti

Tnk p fljande nr du gr anslutningar: 4 Stng av alla komponenter i anlggningen innan du ansluter nya komponenter, inklusive hgtalare. 4 Stng av alla komponenter i anlggningen innan du ndrar ngon anslutning i anlggningen. Vi rekommenderar ocks att du 4 Vrider ner volymen p frstrkaren helt och hllet innan frstrkaren stngs av eller stts p.

Viktigt

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RC-1550 Stereo Control Amplifier

Contents

Important Safety Instructions. 2 Figure 1: Controls and Connections 3 Figure 2: RR-AT94 Remote Control 3 Figure 3: Input and Output Connections 4 Important Notes 5 About Rotel. 6 Getting Started. 6 A Few Precautions 7 Placement 7 Cables 7 Remote Control. 7 Remote Sensor Remote Control Batteries 7 AC Power and Control. 7 AC Power Input u 7 STANDBY Switch and Indicator 1 and Remote POWER Switch E 8 Input Signal Connections = and q. 8 Line Level Inputs q 8 Phono Input = and Ground Connection - 8 Recorder Connections w. 8 Output Connections e. 8 IR Inputs and Outputs. 8 External Remote Input r 8 IR Output t 8 12V Trigger Connections y. 9 Phones Output 0. 9 Media Player Input 9. 9 Audio Controls. 9 Volume Controls 5 and C 9 Mute Button A 9 Balance Control Tone On/Off Switch Bass and Treble Controls Listening Selector Controls 8B 9 Recording Selector Control Controlling Other Components. 10 CD Functions DG 10 DVD Functions DG 10 Tuner Functions F 10 Troubleshooting. 10 Standby Power Indicator Is Not Lit 10 Fuse Replacement 10 No Sound 10 Remote Control Code Conflicts 10 Resetting the IR codes 10 Specifications. 11

About Rotel

Our story began nearly 50 years ago. Over the decades, we have received hundreds of awards for our products and satisfied hundreds of thousands of people who take their entertainment seriously - like you! Rotel was founded by a family whose passionate interest in music led them to manufacture high-fidelity components of uncompromising quality. 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. Rotels 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, semiconductors from Japan or the United States, while toroidal power transformers are manufactured in Rotels own factory. We all have concerns about our environment. And, as more and more electronics are produced and later discarded, it is especially important for a manufacturer to do all it can to engineer products that have a minimum negative impact on landfill sites and water tables. At Rotel, we are proud to do our part. We have reduced the lead content in our electronics by using special ROHS solder, while our new Class D (not digital) amplifiers are up to five times more efficient than our legacy designs and still deliver power and performance. These products run cool, give minimum wasted energy, are good for the environment and give better sound too. Finally, we have printed this brochure on recycled paper stock. While we understand that these are small first steps, they are still important ones. And we continue to pursue new methods and materials for a cleaner and greener manufacturing process. All of us at Rotel thank you for buying this product. We are sure it will bring you many years of enjoyment.

Getting Started

Thank you for purchasing the Rotel RC1550 Stereo Control Amplifier. When used in a high-quality music audio system, it will provide years of musical enjoyment. The RC-1550 is a full featured, high performance preamplifier. All aspects of the design have been optimized to retain the full dynamic range and subtle nuances of your music. The RC-1550 has a highly regulated power supply incorporating a Rotel custom-designed toroidal power transformer and custom-made slit foil capacitors. This low impedance power supply has ample power reserves, which enables the RC-1550 to easily reproduce the most demanding audio signals. This type of design is more expensive to manufacture, but it is better for the music.

English Remote Sensor 2

The RC-1550 printed circuit boards (PCB) are designed with Symmetrical Circuit Traces. This insures that the precise timing of the music is maintained and faithfully recreated. The RC1550 circuitry uses metal film resistors and polystyrene or polypropylene capacitors in important signal paths. All aspects of this design have been examined with the final goal being faithful reproduction of music. The RC-1550 is straightforward in its installation and operation. If you have experience with other stereo systems, you shouldnt find anything perplexing. Simply plug in the associated components and enjoy.
The remote sensor receives infrared signals from the remote control. Do not cover or block the sensor. It must be unobstructed or the remote control will not work properly. The operation of the remote sensor can also be affected if it is exposed to bright sunlight or certain types of lighting (such as halogen lights) that emit infrared light. In addition remote control functions may not work reliably if the batteries in the RR-AT94 are weak. Note: To use the remote, aim it at the remote sensor on the front panel of the RC-1550.

A Few Precautions

Please read this manual carefully. It provides complete information on how to incorporate the RC-1550 into your system as well as general information that will help you get optimum sound performance. 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 RC-1550 shipping carton and all enclosed packing material for future use. Shipping or moving the RC-1550 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 RC-1550. 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.

Remote Control Batteries

Two UM-4/AAA size batteries (supplied) must be installed before the remote control can be used. To install the batteries, remove the cover on the back of the RR-AT94. Install the batteries as shown in the illustration in the battery well. Test the control for proper operation, then replace the cover. When the batteries become weak the remote control wont operate the RA-1520 consistently. Installing fresh batteries should eliminate the problem.

AC Power and Control

AC Power Input u
Note: Be sure to set the Volume control to the minimum (full counterclockwise) position before connecting the power cord. Connect the supplied power cord to the AC Input receptacle on the rear panel. Do not connect the power cord to the power outlet until all the audio input and output connections have been made. It is usually best to plug the RC1550 directly into a 2-pin polarized wall outlet. Avoid the use of extension cords. 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 components connected to it. Your RC-1550 is configured at the factory for the proper AC line voltage in the country where you purchased it (either 120 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 rear panel. Note: Should you move your RC-1550 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 RC-1550 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.

Placement

Like all audio components that handle low-level signals, the RC-1550 can be affected by its environment. Do not stack the RC-1550 on top of a power amplifier. This will minimize chance it will pick up hum or interference. We recommend installing the RC-1550 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.

Cables

Be sure to keep the power cords, digital signal cables and regular audio signal cables in your installation away from each other. This will minimize the chance of the regular audio signal cables picking up noise or interference from the power cords or digital cables. Using only high quality, shielded cables will also help to prevent noise or interference from degrading the sound quality of your system. If you have any questions see your authorized Rotel dealer for advice about the best cable to use with your system.

Remote Control

The RC-1550 includes an RR-AT94 remote control that operates many of the controls of the RC-1550. In addition, the remote operates basic features of some Rotel CD players, DVD players, and AM/FM tuners. See the Audio Controls and Controlling Other Components sections of this manual for detailed information.
STANDBY Switch and Indicator 1 and Remote POWER Switch E

The STANDBY switch 1 is located on the left side of the front panel. To use the RC-1550, press the STANDBY switch. The switch button will remain in its IN position and the ring around the Standby switch will light. In addition the indicators above the selected Listening input button 8 will light. When the STANDBY switch is pushed in, you can turn the RC-1550 on, or put it in Standby mode, with the POWER button E of the RR-AT94 remote control. When the RC-1550 is in Standby mode, pressing one of the RRAT94 Input Selector buttons B turns the unit on and selects the corresponding input. If you will not be using the RC-1550 for a long period of time, press the front panel STANDBY switch to turn it Off. The button will return to its Out position and all the front panel indicator lights will turn off. Note: Be sure to set the Volume control to the minimum (full counterclockwise) position before you push in the STANDBY switch.

Recorder Connections w

The Tape 1 and Tape 2 inputs and outputs can be connected to any record/playback device that accepts standard line level analog input and output signals. Typically that will be a conventional tape recorder. When connecting a recorder to the RC-1550, remember that the outputs of the recorder must be connected to the tape inputs of the RC1550. Similarly the tape outputs of the RC-1550 must be connected to the inputs of the recorder. As with other sources be sure to connect the Left and Right channels of each device to the proper channels on the associated components. Use high quality connecting cables to prevent loss of sound quality.

Output Connections e

Most RCA-type output connectors are compatible with most power amplifiers. As always, use high quality cables and be sure to connect the Left and Right channel outputs of the RC-1550 to the correct channels of the amplifier. Note: There are two sets of RCA outputs on the RC-1550. The second set of outputs may be used in custom system configurations to drive a second power amplifier or to supply a signal to a special signal processor.
Input Signal Connections = and q
[See Figure 3.] The RC-1550 has conventional RCA-type connectors for all inputs. Note: To prevent loud noises that neither you nor your speakers will appreciate, make sure the system is turned off when you make any signal connections.

IR Inputs and Outputs

External Remote Input r
This 3.5 mm mini-jack (labeled EXT REM IN) receives command codes from an industry-standard infrared receivers located in the main listening room. This feature is useful when the unit is installed in a cabinet and the front-panel sensor is blocked. Consult your authorized Rotel dealer for information on external receivers and the proper wiring of a jack to fit the mini-jack receptacle. Note: The IR signals from the EXTERNAL REMOTE IN jack can be relayed to source components using external IR emitters or hard wired connections from the IR OUT jacks.

Line Level Inputs q

The CD, Tuner, and Aux inputs of the RC-1550 are line level inputs. These are for connecting the analog outputs from components such as CD players, DVD players, video disc recorders, tuners for audio or video, or VCRs. The Left and Right channels are clearly labeled and should be connected to the corresponding channels of the source component. The Left RCA connectors are white, the Right connectors are red. Use high quality RCA cables for connecting input source components to the RC-1550. Ask your authorized Rotel dealer for advice about cables.

IR Output t

Phono Input = and Ground Connection -
Plug the cable from the turntable into the appropriate left and right phono inputs. If the turntable has a ground wire connect it to the screw terminal to the left of the Phono inputs. It will help prevent hum and noise.
The IR OUT 1 and 2 jacks send IR signals received at the EXTERNAL REM IN jack to an infrared emitter placed in front of a source component or to other Rotel components with compatible rear panel IR input connectors. This output is used to allow IR signals to pass along IR signals from a remote control when the sensors on the source components are blocked by installation in a cabinet. See your authorized Rotel dealer for information on IR repeater systems. NOTE: The EXT REM IN jack located next to these jacks is for use with an external IR sensor duplicating the front panel IR sensor and located in the primary zone.

English

12V Trigger Connections y
Many Rotel amplifiers offer the option of turning them on and off using a 12 volt trigger signal sent to them. The RC-1550 provides a 12 volt trigger output to take advantage of this feature. When the RC1550 is turned on, a 12 volt DC signal is sent to the amplifier to turn them on. When the RC1550 is put in STANDBY mode, the trigger signal is interrupted and the amplifiers turn off. To use the remote turn on feature, connect the RC1550 12V TRIGGER OUT jack to the 12 volt trigger input of a Rotel amplifier, using a cable with mono 3.5 mm mini-plugs on both ends. The +12 V DC signal appears at the tip connector.

Audio Controls

The front panel Volume control 5 increases or decreases the volume in both channels at the same time. Turn it clockwise to increase the volume or counterclockwise to decrease the volume. On the RR-AT94 remote use the Volume + and buttons C to increase or decrease the volume level.

Volume Controls 5 and C

Mute Button A
Remote Only Push the MUTE button on the remote once to turn the sound off. Press the button again to restore previous volume levels. The LED in the volume control will flash when the unit is muted. Note: Pressing the volume buttons on the remote also cancels the muting function.

Phones Output 0

The Phones output allows you to connect headphones for private listening. This output accommodates standard 1/8 stereo mini plugs. If your headphones have a 1/4 plug you will need an adapter plug. Contact your authorized Rotel dealer, to get the correct adapter plug. Note: Plugging in a set of headphones does not cut off the signal to the outputs. In most instances you should turn off the power amplifier when listening to headphones.

Balance Control 6

The Balance Control adjusts the left-to-right balance of the sound output. Normally the control should be in the center position. In some situations, typically when the main listening position is not ideally centered between the speakers, it may be necessary to adjust the control to achieve proper left-to-right balance. Turning the control counter-clockwise shifts the sound balance to the left. Turning the control clockwise shifts the sound balance to the right.

Media Player Input 9

A 3.5mm (1/8) stereo input socket for a Media Player is provided on the front of the RC-1550. To select it, turn the front panel LISTENING control 8 to AUX or press the AUX 1 button B on the RR-AT94 remote control. Any portable stereo cassette, compact disc player or hard disc playback device can be connected via this input. If the Media Player input is connected to the headphone outputs of the player note that you may need to adjust the volume control on the player for sound to be heard. If the sound is loud and distorted turn down the volume on the player. If the sound is not loud enough, even when the RC-1550 volume control is turned up fairly high, then carefully turn up the volume control on the player. Note: When the 3.5mm (mini jack) is inserted into the Media Player socket the rear input called AUX is disconnected. Removing the 3.5mm plug from the Media player socket will allow the rear AUX input to function.

Tone On/Off Switch 4

When the Tone Switch is in the Off (out) position the Bass and Treble Control circuits are bypassed to ensure the purest possible sound. Leave the Tone Switch in the Off position unless you want to use the Tone Controls. Push in the Tone Switch if you want to adjust the Tone Controls.

Bass and Treble Controls 3
When the Tone Switch is pushed in, turning the Bass and Treble Controls adjusts the tone balance of the sound. Turn the Controls clockwise to increase the bass or treble output. Turn the Controls counterclockwise to decrease the bass or treble output. A properly set up high-performance audio system produces the most natural sound with little or no adjustment of the tone controls. Use these controls sparingly. Be particularly careful when turning the controls up (clockwise). This increases the power output in the bass or treble range, increasing the load on the amplifier and speakers.
Turn the front panel control 8, or press one of the remote control buttons B, to select the input signal that goes to the main outputs and to the power amplifier or, more simply, which source is heard.
Listening Selector Controls 8B
Recording Selector Control 7
Front panel only Turn the front panel control 7 to select the input signal that goes to the record outputs. When you are not recording, set the control to Off. This minimizes the chance of interference from other components in the system. Having a separate Recording and Listening selector adds a significant degree of flexibility in how you can use the RC-1550. For example by selecting CD with the Record Selector and selecting Tuner with the Listening Selector you can record a CD onto a tape while listening to the tuner. If you have a three-head recorder or a DAT recorder that allows simultaneous read and write operation, you can monitor the recording by setting the LISTENING control 8 to the Tape 1 or Tape 2 position. Note: If you select TAPE 1 with the RECORDING control 7, the recording signal will only be available at the TAPE 2 recording outputs. To copy a tape from one tape recorder to another, connect the source recorder to the TAPE 1 inputs and outputs and set the RECORDING control to Tape 1. Connect tape recorder you are copying to to the Tape 2 inputs and outputs.

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 RC-1550, refer to the suggestions for the following conditions:

Standby Power Indicator Is Not Lit
The Standby Power Indicator should be lit whenever the RC-1550 is plugged into the wall power outlet. If it does not light, test the power outlet with another electrical device, such as a lamp. Be sure the power outlet being used is not controlled by a switch that has been turned off.

Fuse Replacement

If another electrical device works when plugged into the power outlet, and the Standby Indicator still will not light when the RC-1550 is plugged into the wall outlet, it indicates that the internal power fuse may have blown. If you believe this has happened, contact your authorized Rotel dealer to get the fuse replaced.

No Sound

Controlling Other Components
In addition to operating many of the controls of the RC-1550, the RR-AT94 remote control can operate basic features of some Rotel CD players, DVD players, and AM/FM tuners.
Check the signal source to see if it is functioning properly. Make sure the cables from the signal source to the RC-1550 inputs are connected properly. Be sure the Listening Selector is set to the proper input. Check the power amplifier for power and proper operation. Check all the wiring between the RC-1550 and the power amplifier, and the power amplifier and speakers.
CD Functions DG The / PLAY,. STOP, , PAUSE, { } TRACK and, RANDOM
buttons, and NUMERIC buttons (0 - +10) operate many Rotel CD players after the CD button on the remote has been pressed.
Remote Control Code Conflicts
DVD Functions DG The / PLAY,. STOP, , PAUSE, {}TRACK and RANDOM buttons
operate Rotel DVD players, after the AUX1 button on the remote has been pressed.
Rotel uses the same IR remote control codes for all its audio products. In systems that have multiple Rotel products, the IR control codes of a remote control that is supplied with one product may interfer with the control codes of another product. The RR-AT94 and the RC-1550 can be set to alternate control codes to prevent such conflicts. To change the IR codes of the RR-AT94, press the Phono button and the 2 button at the same time. To change the IR codes of the RC-1550, point the RR-AT94 at the RC-1550 then press and hold the 2 button for 5 seconds. The LED in the volume control will flash to indicate the IR code has changed. Note: After changing the remote codes for the remote control and the preamplifier as described above, the remote control will no longer operate the Rotel tuners. To return the RR-AT94 IR code to the default setting, press the Phono button and the 1 button at the same time. To return the IR code of the RC-1550 to the default setting, point the RRAT94 at the RC1550 and press and hold the 1 button for 5 seconds. The LED in the volume control will flash to indicate the IR code has changed.

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Specifikationer
Total harmonisk frvrngning (THD) (Hz) < 0,006 % Intermodulationsfrvrngning (60 Hz :7 kHz, 4:1) 0,006 % med 1 V < utsignal Ingngsknslighet/-impedans Phono-ingng Linjeingng 1,4 mV/68 kohm 170 mV/24 kohm 70 mV 1 V/100 ohm Hz, 0,5 dB Hz, +0, 3 dB +/6 dB vid 100 Hz +/6 dB vid 10 kHz 70 dB 95 dB 230 volt, 50 Hz 120 volt, 60 Hz 6 watt 1 watt 431 x 99 x 337 mm 88,1 mm (2U) 6,2 kg
Phono-verbelastning Utgngsknslighet/impedans Frekvensomfng Phono-ingng Linjeingng Bas Diskant Phono-ingng Linjeingng Europa USA

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The Rotel Co. Ltd. 10-10 Shinsen-Cho Shibuya-Ku Tokyo 150-0045 Japan Rotel of America 54 Concord Street North Reading, MA 01864-2699 USA Phone: +1 978-664-3820 Fax: +1 978-664-4109 Rotel Europe Dale Road Worthing, West Sussex BN11 2BH England Phone: + 44 (0)761 Fax: +44 (0)525 Rotel Deutschland Vertrieb: B&W Group Germany GmbH Kleine Heide 12 D-33790 Halle/Westf., Deutschland Tel.: 05201 / 87170 Fax: 05201 / 73370 E-Mail: info@bwgroup.de www.rotel-hifi.de www.rotel.com
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