Rotel-RA-311-Owners-Manual
 POWER
| ВЫ TABLE OF CONTENTS
INTRODUCTION ooo
REAR PANEL CONNECTIONS .......
INSTALLATION vn
FRONT PANEL CONTROLS .......
OPERATION un
SPECIFICATIONS ..............
........‚;.....
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Sy N © N ma wa
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
STEREO
true high fidelity as never before. lts 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.
SPEAKERS -1
LEFT RIGHT
RECORD PLAYER
(CER)
STEREO
RECORD PLAYER
(MAG)
STEREO
8-TRACK PLAYER
00000
И ©
Oo 00000 O |]
STEREO TAPE RECORDER
AC OUTL
SWITCHED
AC
POWER
CORD
LEFT | RIGHT
SPEAKERS -2
first making sure that speakers are connected properly and
all the other necessary connections are made.
SPEAKER CONNECTION
This unit is equipped with quick-connect jaw-snap termi-
nals 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
© on the extreme left of the terminal block. Similarly,
connect your left speaker between the adjacent SPKR-1
terminals marked (BH and ©. If you wish to connect a
second pair of speakers, connect them to SPKR-2 termi-
nals 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 MAG is suitable
for record player with regular magnetic cartridge.
The CER is for record player. with ceramic cartridge.
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 receptacles.
AUX CONNECTION
Your amplifier has two pairs of AUX input receptacles for
use with high level program sources: tape recorder, tuner,
cassette recorder, 8-track cartridge player, TV sound or a
ceramic microphone. It 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.
AC OUTLETS
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 equipments connected to the
AC Outlets must not exceed 200 watts.
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 voitage 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 name plate on
the rear panel 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.
2.
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 2 amp. fuse in the AC input
POWER INDICATOR -——
LIGHT
POWER SWITCH—
circuit. In addition, the DC circuits and the speaker
circuits are protected by two 1.5 amp. fuses. 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.
HIGH FILTER SWITCH
LOUNDNESS SWITCH
MODE CONTROL
MONITOR CONTROL
RECEPTACLE
SPEAKERS CONTRO
BASS CONTROL
TREBLE CONTROL
INPUT SELECTOR
CONTROL
VOLUME CONTROL
BALANCE CONTROL
= pars ; — , |
Soiree
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. Turn 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. Turning to left increases the treble, and to
right 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, TUNER and AUX.
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; SPKR 4CH
to activate speaker matrix for simulated 4-channel sound
using both SPKR-1 and SPKR-2.
POWER PILOT 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 deactivate the circuit. In describing these
switches we will consider the IN position to be “ON”
and the OUT position to be “OFF”
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
pilot light will be illuminated.
LOUNDNESS 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.
TAPE SWITCHES: allows you to playback, monitor, and
dub two tape recorders. TAPE 1 switch is used with the
tape recorder connected to the TAPE MONITOR-1 termi-
nals on the rear panel and TAPE 2 switch is for the tape
recorder connected to the TAPE MONITOR-2 terminals.
If you have the tape recorder with DIN plug connected to
the DIN socket on the rear panel, use TAPE 1 switch.
Push in to “MONITOR” position to playback pre-
recorded tapes, either TAPE 1 or TAPE 2 depending on
which tape recorder you will be using. When dubbing or
duplicating the tape recorder connected to TAPE 1 by the
tape recorder connected to TAPE 2, push in TAPE 1
switch to “MONITOR”. Set both switches to “SOURCE"
positions whenever tape recorder is not being operated
but other program material is being played.
If your tape recorders have separate playback heads,
“MONITOR” positions also can be used as monitors
during recording; setting to these positions will allow you
to listen to program as actually being recorded. So, you
can compare recording program playing (“SOURCE"
position) with same program being actually recorded
( “MONITOR” position).
PHONES RECEPTACLE: Simply plug in your head-
phone lead and switch off unwanted speakers for private
listening.
Having made ail 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, remove and check the DC fuses
(BE SURE POWER SOURCE IS DISCONNECTED).
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 switch to MONO.
b) Tune in a program with a distinct solo part (e.g.
voice). |
с) 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.
а) If the phasing is wrong, reverse the (and (© speaker
connections.
TUNER
Turn the input selector control to the TUNER position,
and set the mode switch to STEREO or MONO depending
upon the program selected. Use all other controls and
switches according to taste and listening conditions. Set to
the AUX 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. Set the mode
control to STEREO or MONO depending upon the mode
of the record disc selected.
If you have two record players connected to this receiver,
the one you are operating will be heard through the
speakers.
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, push
either TAPE switch 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 function selector
control to TUNER or AUX depending on which your
tuner is connected, and to record off records turn to
PHONO. To record off the equipments such as cassette
recorder or 8-track cartridge player connected to AUX
terminals on the rear panel, turn the contro! to AUX.
To record off (dubbing) the tape recorder connected to
TAPE 1 by the tape recorder connected to TAPE 2, push
in TAPE 1 switch to “MONITOR”, and operate both
recorders. Note you cannot dub the recorder connected
to TAPE 2 by the one connected to TAPE 1; it can be
done if you plug the output cables of tape recorder
connected to TAPE 2 to AUX terminals on the rear panel.
IT your tape recorder is equipped with a separate playback
head, turning TAPE 1 or TAPE 2 switch to “MONITOR”
- Will cause the input source to be bypassed and will permit
you to listen to the recording being made on the tape.
When dubbing, only the tape recorder that is recording
will be monitored; so pushing in TAPE 2 switch will let
you monitor program being played by TAPE 1.
SPEAKER MATRIX 4-CHANNEL
In general the Speaker 4-Channel switch on the rear
chassis should be set at NORMAL position for individual
stereophonic operation of main speaker system and
remote speaker system (SPKR-1 and SPKR-2). However,
if you wish to listen to stimulated 4-channel sound, set
the switch to the SPKR 4CH position and use your
remote pair of speakers as the rear speakers of 4-channel
system. You will be certain to enjoy a “surround effect”
of this stimulated 4-channel, placing the speakers as
suggested below.
L- FRONT R - FRONT
WHERE TO 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. 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.
Power Amplifier Section
Power Output:
Total Music Power (IHF) — ..............ee.mnem... 100 watts at 4 ohms
Continuous Power (RMS) .............e.e.eee=—s 24 watts/channel
(both channels driven, THD less than 1%) at 4 ohms
20 watts/channel
at 8 ohms
Harmonic Distortion .........e..ee«esoconcenvanarona less than 0.15%
at 18w/ch RMS,
8 ohms and 1KHz
Intermodulation Distortion ............e..ee=.... 0.5% at 20w/ch
Frequency Response ............e—esnsneseneneonmeno 15 to 70,000Hz,
+0dB - 3dB at 8 ohm
Power Bandwidth (IHF) ...........e.ee.eeservecres 20 to 50,000Hz
at 8 ohms
Damping Factor ........ eninenenmeno Dnanenecennenenaas 35 at 8 ohms
Speaker Impedance ..........—..mme.0esanorenonecenen 4 to 16 ohms
Hum and Noise:
PHONO 1, PHONO 2 ee... enemanarneconanas 65dB
TUNER, AUX1, AUX2, TAPE IN ....... 75dB
Residual Noise .........—..-e..rwesenrnneceroaons .. 1.8mV
Input Sensitivity/I mpedance:
PHONO (MAG) coerce sascraencaes 2.5mV/40K ohms
PHONO (CER)............ecemnaecvnasncconanvanenaa 140mV/94K ohms
TUNER, AUX1, AUX2, TAPE IN ....... 170mV/46K ohms
TAPE MONITOR IN, DIN, 1 & 2....... 150mV/45K ohms
DIN OUT ............orcrosancassenananerenec rennes 30mV/80K ohms
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.
Phono Equalizer .................ee=eeeessvecaneesnnne RIAA +1dB
50 to 15,000Hz
Phono Overload ...........e.ece=eeernieceroconacanaenea 100mV
Loudness Switch ....….…rcesrencececansenmencecnse +10dB at 50Hz,
+4dB at 10,000Hz
High Filter vorrei renee -10dB at 10KHz
Bass Control .........e.....n=esnroeeneceronnercaconeco +10dB at 50Hz
Treble Control .....…....………sercrensecnsennses .... +10dB at 10,000Hz
Crosstalk _......censensenrernenereseennensansen sa name -45dB at 10kHz
Miscellaneous
Power Requirements aussen nenn een kenn 100, 117, 220, 240V
50/60Hz
Power Consumption — ............—..=.. men... 150 watts (maximum)
Note: features and specifications subject to changes for improvement without notice.
Roland Electronics Co., Ltd. 1-36-8 Ohokayama, Meguro-ku, Tokyo, Japan
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