Rotel-RA-810-Owners-Manual
 TABLE OF CONTENTS
INTRODUCTION
REAR PANEL CONNECTIONS
INSTALLATION
FRONT PANEL CONTROLS
OPERATION "....
SPECIFICATIONS
OU 0 UN = —
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-
formance is exceptional: it will allow you to experience
true high fidelity as never before. Its full and natural
stereophonic 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.
REAR PANEL CONNECTIONS
STEREO ROCORD PLAYER STEREO TAPE RECORDER STEREO TAPE RECORDER
LD) (LEAN LD (LAN
STEREO
8-TRACK PLAYER
STEREO NE) WIN
[+] OO ООО О © ООО
О ооо О TUNER OUTPUT INPUT OUTPUT INPUT
SWITCHED AC OUTLETS
MAX 200W
TEREO RECORD PLAYER
VARIABLE INPUT
SENSITIVITY AND
IMPEDANCE SWITCHES
FOR PHONO 2
(GO
QT ST
OO ООО
STEREO
TAPE RECORDER SPKR-1 SPKR-2 SPKR-1 SPKR-2
WITH DIN PLUG) RIGHT SPEAKERS LEFT SPEAKERS
AC POWER CORD
AC FUSE
3A, 100 — 120V
1.5A, 220 — 240V
UNSWITCHE
AC OUTLET
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 SPKR-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 O on the extreme left of the
terminal block. Similarly, connect your left speaker
between the adjacent SPKR-1 terminals mari-ed $ and O.
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 all connections have been made, and 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. If you have another tuner, connect it
to AUX 1 or AUX 2 receptacles.
AUX CONNECTION
Your amplifier has two pairs of AUX input receptacles for
use with high level program sources: tape recorder, tuner,
cassette recorder, &-track cartridge player, TV sound or a
ceramic microphone. lt 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 QUT and
MAIN AMP IN, connected with a pair of jumper pins on
the rear chassis. Normally with the pins in place, your
receiver is the combined equipment of integrated pre-
amplifier and main-amplifier sections. However, by remov-
ing 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 between 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 auxiliary
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 control 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 watts. 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 lines up with the pointer line of the
voltage you desire.
240V — 1 r—-117v
OS + Jo
2207 — —-100V
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 3 amp fuse in the AC 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
HIGH FILTER SWITCH
LOW FILTER SWITCH
TONE SWITCH
POWER SWITCH
SPEAKERS CONTROL
BASS CONTROL
TREBLE CONTROL
PHONES RECEPTACLE
LOUDNESS SWITCH
MUTING SWITCH
VOLUME CONTROL
POWER INDICATOR
LIGHT
BALANCE CONTROL
INPUT SELECTOR CONTROL
MODE CONTROL
MONITOR CONTROL
he
VOLUME CONTROL: regulates the sound 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. Slide to right for increase in sound level from
the right channel, and to left 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. Sliding upward increases the treble, and down-
ward reduces the treble.
BASS CONTROL: regulates low frequency sounds, and
operates in the same manner as the treble control.
INPUT 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; “1” 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 — 27 to dub the tape recorder
connected to TAPE 1 by the tape recorder connected to
TAPE 2; “2 > 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
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. “L+R” to activate
monophonic operation.
“L” 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” positions
depend upon program source — stereophonic or mono-
phonic.
POWER INDICATOR LIGHT: allows visual indication
that power is activated.
The push button switches used are all of the PUSH/PUSH
type; that is push in to activate the circuit and push again
to release or de-activate 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 whenever you wish to reduce
annoying record scratches, tape hiss, FM background
noise, etc.
LOW FILTER: allows you to reduce the low frequency
response of your amplifier whenever you 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”, power
indicator will be illuminated.
TONE SWITCH: permits you to deactivate the tone
control circuit and provide an absolutely linear flat
response when in “DEFEAT” position. Leave at
“NORMAL” position when wish to use tone controls.
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
check 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 and check the DC fuses inside
the chassis (BE SURE POWER SOURCE IS DISCON-
NECTED). If a fuse or fuses are blown, check possible
reasons for 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:
a) Set the MODE control to L+R{mono).
b) Tune in a program with a distinct solo part (e.g.
voice).
c) If the speakers are in phase (correct connection) the
solo will appear to come from the center point
between the speakers. If they are not in phase, the
sound will appear to come from the two speakers
separately.
d) If the phasing is wrong, reverse the ® and © speaker
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 (2, 4 and 8mV) and im-
pedances (30k, 5Ok 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 characteristics list should be
attached with the cartridge.
PLAYBACK OF TAPE RECORDING
1. When using AUX inputs |
Turn the input selector control 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 271 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 being recorded. When dubbing, only the tape
recorder that is recording will be monitored.
WHERE TO PLACE Co :
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. It 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 record 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.
SPECIFICATIONS
Power Amplifier Section High Filter L….…scsssenneenssssensencensensaense
Power Output: LOW Filter …..……sesersrsensersenneanmencenearsenences
Total Music Power (1HF) ........... ee... 180 watts at 4 ohms Muting Switch ........... eme.
125 watts at 8 ohms Bass Control ............e.eeree eee eeD eee
Continuous Power (RMS) une. 60 watts/channel at 4 ohms Treble ContrOl versenkt ernennen RER RRR REKEN
(both channeis driven, THD less than 0.5%} 40 watts/channel at 8 ohms Crosstalk .........e..ee.eeeercecneenvenseortereerer eee
Harmonic Distortion ............—.—e—.—ee.e...... less than 0.3%, 20 to 20,000Hz Square Wave Risetime ..........................—...
at 40w/ch
Intermodulation Distortion ............—.—.... 0.1% at40w/ch Miscellaneous
Frequency Response ..............reesveriuoeceos 4 to 75,000Hz, +0db —3db Power Requirements ...................esvc..
Power Bandwidth (IHF) ......................... 5 to 50,000Hz at 8 ohms Power ConsuMplión.............—mee.memmmee
Input Sensitivity/Impedance ................... 1V/30k ohms Dimensions ........... . Lannsapasanareenementace0an es
Damping Factor ...........e.ee.eeeereczerencenezene 35 at 8 ohms
Speaker Impedance asien 4 to 16 ohms
Weight. reer re rsa aa
Pre-Amplifier Section |
Output Voltage ..........e.ereeenererereccenrernene—e 1V (rated), 3V (maximum)
Harmonic Distortion L..…...…....….ssseeccreres less than 0.1% at rated output
voltage
Frequency Response ......e.em.eezeneraamane e... 3 to 50,000Hz, +0db —3db
Hum and Noise:
PHONO 1, PHONO 2 —.........e.eeevmorevees. 65db
TUNER, AUX1, AUX2, TAPE IN....... 75db
Residual Noise ,.......e.....e.=eenarvevenocenecama 1.5mV
Input Sensitivity/Impedance:
PHONO 1 nnrreornocroncannanaasnenacacararenan enema ns 2mV/100K ohms
PHONO 2 .r....eeconccuonioaaconeoneneno o eane nene. 2, 4, 8mV/30k, 50k, 100k ohms
TUNER, AUX1, AUX2, TAPE IN....... 200mV/45 ohms
TAPE DIN Lcccrsarononveseresrerensansonsennenes 330mV/100k ohms
Phono Equalizer _…..…..ssreseressorenanrsnrscu ns EEF type, RIAA £0.5db 50 to
15,000Hz
Phono Overload ........... eee =..s2íse0menenceecenece. 125mV
Loudness SWitc\….....…crcsrsssonsensnesnenasseneane +10db at 50Hz, +6db at
10,000Hz
—10db at 10KHz
—10db at 50Hz
—20db at 1,000Hz
+ 10db at 50Hz
+ 10db at 10,000Hz
43db at 1,000Hz
5 microseconds
100, 117, 220, 240V 50/60Hz
150 watts (maximum)
420mm(W) x 304mm(D)
x140mm(H), 16%" x 12" x 5%"
10kg/221bs
Note: features and specifications subject to changes for improvement without prior notice.
Roland Electronics Co., Ltd. 1-36-8 Ohokayama, Meguro-ku, Tokyo, Japan
Printed in Japan, Oct, '74
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