Rotel RA1210 User's Manual
Contents
1. cassette recorder 8 track cartridge player TV sound or a ceramic microphone t should be noted that AUX is used only for the playback purpose and for recording see TAPE RECORDER CONNECTION below When connecting a stereo tape recorder connect both output cables to the AUX LEFT and RIGHT input jacks on the rear chassis For cassette or 8 track cartridge similar procedure is followed When connecting a mono phonic equipment connect the single output lead to either of the AUX LEFT or RIGHT input jack TAPE RECORDER CONNECTION Terminals are supplied for connecting two tape recorders which incorporate playback preamplifier Connect the right and left output cables of the tape recorders to the TAPE MONITOR terminals marked IN and connect its right and left input cables to the TAPE MONITOR terminals marked OUT If you have tape recorders with DIN type plugs connect it to the REC PB DIN sockets PRE AMP OUT AND MAIN AMP IN RECEPTACLES There are pairs of terminals marked PRE AMP OUT and MAIN AMP IN connected with a pair of jumper pins on the rear chassis Normally with the pins in place you reciever is the combined equipment of integrated pre amplifier and main amplifier sections However by re moving the jumper pins your unit in essence becomes two independent components consisting of one pre amplifier and one main amplifier These receptacles are intended for use with any necessary equipment designed to be installed between2. TL Z je L A J JL 9960 3 3309 GGGG aonn ann VARIABLE INPUT SENSITIVITY AND IMPEDANCE SWITCHES AC POWER CORD FOR PHONO 2 AC FUSE 3A 100 120V S 1 5A 220 240V UNSWITCHED AC OUTLET L C ISS STEREO SPKR 1 SPKR 2 SPKR 1 SPKR 2 TAPE RECORDER WITH DIN PLUG RIGHT SPEAKERS LEFT SPEAKERS INSTALLATION IMPORTANT Do not apply power to this unit without first making sure that speakers are connected properly and all the other necessary connections are made SPEAKER CONNECTION This unit is equipped with terminals for connecting two sets of speakers Connect your main pair of speakers to the terminals marked SPKA 1 Ensure that your right speaker is connected to the terminal marked and that the ground terminal on the right speaker is connected to the terminal marked on the extreme left of the terminal block Similarly connect your left speaker between the adjacent SPKR 1 terminals marked and If you wish to connect a second pair of speakers connect them to SPKR 2 terminals in the manner described above Caution Ensure that the speaker leads are fastened securely to the proper terminals and that there are no stray strands which may cause shorting between terminals If 2 sets of speakers are played simultaneously the impedance of each unit should not be less than 8 ohms Phasing When ail connections have bean made an
3. PLACE Since transistors are extremely susceptible to heat the amplifier has been designed to diffuse heat through the top and rear of its case Therefore special consideration should be given to where it will be used before installing the system If should not be operated in a place where it is exposed directly to the sun near radiators or other heat generating sources and it should never be mounted in an air tight cabinet Finally nothing should be placed on top of it GROUNDING Connect one end of vinyl or enameled wire to the terminal screw marked GND on the rear of the amplifier attach a copper plate to the other end and bury it underground HUM AND NOISE In any high fidelity installation hum may be caused by the interconnection of a record player tuner and ampli fier as a result of the cables and different grounds If hum is experienced with your amplifier disconnect everything but the speakers from the unit If hum persists reverse the AC line cord Plug in the record player and if hum appears reverse the record player power plug and connect a single lead from the reocrd player chassis to the ground post on the rear chassis Connect your other devices in this manner Caution Hum may also be induced by defective con necting cables or by running these cables too close to a strong AC field RA 1210 SPECIAL FEATURES All long life low noise Silicon Transistors Direct Coupling Circuitry Two entirely separat
4. playing SOURCE position with same program being actually recorded monitoring MODE CONTROL L to operate only the sound from the left channel coming out from both speaker systems R for the right channel only STEREO for stereo phonic operation and REV for reversing the left and right channels of stereophonic sound LR to activate monophonic operation LU and R positions allow you to test each channel or compare each other REV position allows you to change listening effect STEREO and L R position depends upon program source stereophonic or mano phonic POWER INDICATOR LIGHT allows visual indication that power is activated The push button switches used are all of the PUSH PUSH type that fs push in to activate the circuit and push again to release or deactivate the circuit In describing these switches we will consider the iN position to be ON and the OUT position to be OFF MUTING SWITCH allows you to reduce the level of volume by 20db for momentary quieting when you do not wish to change the volume setting but must lower volume temporarily LOUDNESS SWITCH in ON position activates a circuit which boosts low and high sounds at low volume control settings This compensates for the ears loss of sensitivity to bass and treble notes at low listening levels HIGH FILTER allows you to reduce the high frequency response of your amplifier
5. 10db at 10KHz 10db at 50Hz 20db at 1 000Hz 10db at 50Hz 10db at 10 000Hz 45db at 1 000Hz 5 microseconds 100 117 220 240V 50 60Hz 150 watts maximum 420mm W x 304mmi D x140mm H 16 x 12 x BX 13 7kg 30Ibs 1 36 8 Ohokayama Meguro ku Tokyo Japan
6. ROTEL RA 1210 STEREO PRE MAIN AMPLIFIER owner s manual TABLE OF CONTENTS INTRODUCTION REAR PANEL CONNE INSTALL ATION n FRONT PANEL CONTROLS OPERATION THT 5 woe en ROTEL INTRODUCTION We would like to take this opportunity to thank you for purchasing our Stereo Amplifier With the high quality design and workmanship that goes into making this equipment you can be assured of its flawless performance for many years to come We have fitted every control and feature you could conceivably need Designed for both versatility and ease of operation this piece of equipment will add professional studio flexibility to your Hi Fi sound center The per true high fidelity as never before Its full and natural stereaphonic reproduction offers you musical entertain ment approaching that of live performances We sincerely hope you will treasure this professional equipment In order to obtain the maximum use out of your unit please read the following pages of this Operating Manual carefully Do not attempt to operate the unit until you have made all the necessary connections formance is exceptional it will allow you to experience REAR PANEL CONNECTIONS STEREO ROCORD PLAYER STEREO TAPE RECORDER STEREO TAPE RECORDER STEREO 8 TRACK PLAYER TUNER STEREO 0000 STEREO 9 9 TUNER SWITCHED AC OUTLETS MAX 200W STEREO RECORD PLAYER
7. UT SELECTOR enables you to select the function you desire from PHONO 1 PHONO 2 TUNER AUX 1 and AUX 2 SPEAKERS CONTROL allows you to select your speaker systems for activation OFF to deactivate all speaker systems when such as listening to your head phones privately 7377 to activate your speaker systems connected to SPKR 1 terminals on the rear chassis 2 to activate your systems connected to SPKR 2 1 2 to activate both systems SPKR 1 and SPKR 2 MONITOR CONTROL allows you to playback monitor and dub record each other two tape recorders TAPE 1 and TAPE 2 receptacles on the rear chassis each has a pair of output and input RCA jacks and one DIN connector jack 1 gt 2 to dub the tape recorder connected to TAPE 1 by the tape recorder connected to TAPE 2 2 gt 1 to dub the other way around 1 PLAY to playback the tape recorder connected to TAPE 1 and 2 PLAY to playback the tape recorder con nected to TAPE 2 Set to SOURCE position whenever tape recorder is not being played but other material is being played also set to this position when you wish to hear the program source during recording by tape re corder If your tape recorders have separate playback heads 1 PLAY and 2 PLAY positions can be used as monitors when recording setting to either of this position will allow you to listen to program as actually being recorded So you can compare while recording program being
8. d the unit is operating a check on correct speaker phasing should be made This is described in a later section RECORD PLAYER CONNECTION The shielded cables from your stereo record player should be terminated with RCA type phono plugs To avoid loss in the high frequencies the cables should not exceed 10 feet 3 m in length Connect both leads from your record player to the LEFT and RIGHT PHONO input receptacles on the rear chassis If your record player has a ground cable emerging besides two input cables connect this ground cable to the ground terminal post marked GND on the rear chassis This amplifier has two sets of PHONO input receptacles to accommodate two record players The PHONO 1 is suitable for record player with regular magnetic cartridge The PHONO 2 is also for record player with magnetic cartridge but it has the variable input sensitivity and impedance switches to match properly to characteristics of your particular cartridge See the OPERATION section for using the switches If you wish to use ceramic cartridge connect your record player to either of AUX input receptacles TUNER CONNECTION Connect the outputs of your stereo tuner to the LEFT and RIGHT TUNER input receptacles on the rear chassis with shielded cables It you have another tuner connect it to AUX 1 or AUX 2 receptacles AUX CONNECTION Your amplifier has two pairs af AUX input receptacles tor use with high level program sources tape recorder tuner
9. e power supplies 2 power transformers for balanced driving of the left and the right channels A high power output of 230 watts music power at 4 ohms and RMS continuous power of 60 watts both channels driven at 8 ohms with 0 5 THD Specially designed protection circuits to prevent damages to your speakers and to the amplifier Separable Pre Amp and Main Amp sections for many versatile uses 3 stage Differential Pre amplifier Usage of 2 pairs of speaker systems one pair at a time or simultaneously at the same time Facility for two tape recorders with monitoring and dubbing features Facility for two record players with switcheable input sensitivities and impedances for one of them to match characteristics of your cartridge Facilities for a stereo tuner two auxiliary inputs for such as another tape recorder and 8 track tape player Facility for two Tape Din Jacks Facility for 3 AC Outlets Negative Feedback Tone Controls that are varia ble in 2db steps for precise and effective tone adjustments 3 stage Turnover Roll Off switches for both Tone Controls for further precise tone adjust ments Balance and Volume Controls Selector Control Mode Control Monitor Control and Speaker Selection Control Push Push type switches for Muting Loud ness High and Low Filters Power A Power Indicator Lamp for easy visual indi cation A front panel Headphone Jack for private listening Power Amplifier Secti
10. es up with the painter line of the voltage you desire CONNECTING TO POWER SUPPLY Before connecting up ensure that the voltage selector is set correctly for your supply and a suitable plug fitted If you need to fit a plug ensure live neutral and where appropriate earth leads are connected to the proper terminals Ensure the terminals are screwed down firmly and no loose strands of wire are present The unit is protected with a I amp fuse in the ACG input circuit In addition the DC circuits and the speaker circuits are protected by the automatic recoverable circuit breaker and four 3 amp fuses inside the chassis The circuit breaker will keep deactivating and activating the amplifier so if this happens disconnect the power source and find causes of trouble When replacing a fuse be sure to use a fuse of the same rating DO NOT replace with a fuse of higher rating Protection will be lost and severe damage to the unit may result If in any doubt about connecting to the power supply consult a qualified electrician FRONT PANEL CONTROLS TURNOVER ROLL OFF SWITC TREBLE TURNOVER ROLL OFF SWITCH BASS BASS CONTROL POWER SWITCH 1 PHONES RECEPTACL SPEAKERS CONTROL LOW FILTER SWITCH HIGH FILTER SWITCH TREBLE CONTROL INPUT SELECTOR CONTROL POWER INDICATOR LIGHT BALANCE VOLUME MUTING SWITCH LOUDNESS SWITCH MODE CONTROL LCL MONITOR CONTROL VOLUME CONTROL regulates the sou
11. nd level of any program material fed into the receiver The control affects both channels equally eliminating regular balancing Rotate clockwise for increase in sound level BALANCE CONTROL regulates the relative outputs from the two channels Normally the balance control is adjusted to provide the effect of a mono signal coming from a point midway between the speakers When balanced in this way the maximum stereo effect will be achieved Rotate clockwise for increase in sound level from the right channel and counterclockwise for the left channel TREBLE CONTROL regulates high frequency sounds as desired to suit personal taste speaker characteristics etc The center position gives normal flat frequency response Rotating clockwise increases the treble and counterclockwise reduces the treble The rotation is variable in 2db steps for precise adjustment BASS CONTROL regulates low frequency sounds and operates in the same manner as the treble control TURNOVER ROLL OFF SWITCHES allows you to defeat or select various fretyuency ranges of treble and bass effect DEFEAT to deactivate the tone control circuit for absolute flat response The frequency range settings are usually used in pair 400Hz with 2000H2 and 200Hz with 4000Hz The 400Hz and 2000Hz setting is for the normal tone adjustment and the 200Hz and 4000Hz setting for tone cut and boost at lower and higher frequency range INP
12. on Total Music Power IHF Continuous Power RMS asersrassenece both channels driven THD less than 0 5 Harmonic Distortion intermodulation Distortion Frequency Response N Power Bandwidth IHF Input Sensitivity Impedance Damping Factor Ax Speaker Impedance s s s Pre Amplifier Section Output Voltage Beti Harmonic Distortion Frequency Response Hum and Noise PHONO 1 PHONO 2 sese TUNER AUX1 AUX2 TAPE IN Residual Noise vre Input Sensitivity Impedance PHONO 1 PHONO 2 TUNER AUX1 AUX2 TAPE IN TAPE DIN Phono Equalizer Phono Overload Loudness Switch SPECIFICATIONS High Filter Low Filter s Muting Switch Bass Control nss Treble Control 230 watts at 4 ohms 160 watts at 8 ohms 80 watts channel at 4 ohms 60 watts channel at 8 ohms Crosstalk less than 0 3 20 to 20 000Hz at SSw ch 0 1 at S5w ch 3 to 100 000Hz 0db 3db 5 to 50 000Hz at 8 ohms 1V 30k ohms 35 at 8 ohms 4 to 16 ohms Weight Square Wave Risetime Miscellaneous Power Requirements Power Consumption Dimensions 1V rated 3V maximum less than 0 1 at rated output voltage 3 to 50 000Hz 0db 3db 70db at 2mV 80db 0 5mV ImV 100K ohms 1 2 4mV 30k 50k 100k ohms 200mV 45 ohms 330mV 100k ohms EEF type RIAA 0 5db 50 to 15 000Hz 130mV 10db at 50Hz Gdb at 10 000Hz Note Features and specifications subject to change without notice ROLAND ELECTRONICS CO LTD
13. racteristics list should be attached with the cartridge PLAYBACK OF TAPE RECORDING 1 When using AUX inputs Turn the input selector contro to the AUX position and set the MODE to your choice 2 When using TAPE MONITOR inputs To listen to a playback of pre recorded tape turn the mode control to 1 PLAY or 2 PLAY depending on which tape recorder you wish to use The setting of the input selector control is irrelevant in this case and may be left at any position MAKING TAPE RECORDINGS To make off the air recordings turn the input selector control to TUNER or AUX depending on which your tuner is connected and to record off record discs set to PHONO 1 or PHONO 2 To record off the equipments such as cassette recorder connected to AUX 1 or AUX 2 turn to AUX 1 or AUX 2 To record off dubbing the tape recorder connected to TAPE 1 by the tape recorder connected to TAPE 2 turn the monitor control to 172 Set to 2 1 if the other way around If your tape recorder is equipped with a separate playback head turning the monitor control to 1 PLAY or 2 PLAY will cause the input source to be bypassed and will permit you to listen to the recording being made on the tape Setting at the SOURCE position will permit you to listen to the input source Thus with the monitor control you may monitor or compare the recording being made with the source beina recorded When dubbing only the tape recorder that is recording will be monitored WHERE TO
14. the blowout and replace the fuse 3 The phasing of the speakers should be checked If the two speakers are out of phase the stereophonic effect will suffer Check as follows al Set the MODE control to L R mono b Tune in a porgram with a distinct solo part 16 9 voice c If the speakers are in phase correct connection the solo will appear to come from the cneter point between the speakers If they are not in phase the sound will appear to come fram the two speakers separately d If the phasing is wrong reverse the Oand Ospeaker connections TUNER Turn the input selector control to the TUNER position and set the mode control to STEREO or L R depending upon the program selected Use all other controls and switches according to taste and listening conditions Set to the AUX 1 or AUX 2 if your tuner is connected to either receptacles Note Before operating your tuner be sure to read the operating manual or information of the tuner RECORD PLAYER Turn the input selector control to PHONO 1 or PHONO 2 depending on the record player you wish to operate Set the mode control to STEREO or L R depending upon the mode of the record disc selected PHONO 2 has two rear chassis switches to choose 3 different input sensitivities 1 2 and 4mV and im pedances 30k 50k and 100k ohms to match the characteristics of your magnetic cartridge Set the switches accordingly to obtain the optimum performance out of the cartridge The cha
15. the pre amplifier and the main amplifier or for separate use of either section alone Such equipment as electronic audio equalizer or reverberation unit can be used or another pre amplifier or main amplifier may be hooked up Simply disconnect the jumper pins and follow the instructions supplied with the accessory equipment When no auxilary equipment is being used the jumper pins MUST be installed in place in order to use your amplifier AC OUTLET Your amplifier is equipped with two switched AC Outlet to provide power and switching contro to whatever component you may wish to connect to the unit However the total load of equipment connected to the AC Outlets must not exceed 200 warts In addition one unswitched AC Outlet is supplied but without switching control by the POWER switch VOLTAGE SELECTION The amplifier is a variable voltage equipment that can run on 100V 117V 220V or 240V power supply Your unit comes already preset at the proper voltage for use in your area however if you move to an area where the power supply voltage is different the voltage setting can be manually changed BE SURE THAT YOUR UNIT IS NOT CONNECTED TO THE POWER SOURCE BEFORE ATTEMPTING TO MAKE THIS CHANGE To change the voltage setting remove the cabinet and locate the VOLTAGE SELECTOR see figure below Pull up the Voltage Selector plug which has a white arrow on its top Reinsert the Plug to the Selector Base so that the head of the arrow lin
16. whenever you wish to reduce annoying reeord seratches tape hiss FM background noise etc LOW FILTER allows you to reduce the low frequency response of vour amplifier whenever vou wish to reduce annoying record and tape rumbles etc POWER SWITCH performs the function as its name denotes It supplies power to the receiver and to the switched AC outlets When the switch is ON function dial scale will be illuminated PHONES RECEPTACLE Simply plug in your head phone lead and switch off unwanted speakers for private listening OPERATION Having made all connections according to the preceding instructions and become familiar with the functions of the amplifier you are ready to operate the equipment Apply power by plugging into the power source and pushing IN the POWER button Select the speakers you wish to use by turning ON either SPKR 1 or SPKR 2 switch or both according to requirements PRELIMINARY CHECKS 1 If the dial light has failed to illuminate remove and cheek the AC fuse 2 If no sound is heard when all switches and controls are correctly positioned or if sound comes on and goes out repeatedly due to automatic recoverable circuit breaker check if speaker leads are not shorting each other If the circuit breaker is not working and no sound at all remove ond check the DC fuses inside the chassis BE SURE POWER SOURCE S DISCON NECTED If a fuse or fuses are blown check possible reasons for
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