Rotel Stereo Amplifier RA 03 User Guide

Owner’s Manual  
Manuel d’utilisation  
Bedienungsanleitung  
Manuale di Istruzioni  
Manual de Instrucciones  
Gebruiksaanwijzing  
Bruksanvisning  
RA-03  
Stereo Integrated Amplifier  
Amplificateur Intégré Stéréophonique  
Stereo-Vollverstärker  
Amplificatore Integrato Estereofonico  
Amplificador Integrado Estereofónico  
Geïntegreerde Stereo Versterker  
Integrerad Stereoförstärkare  
RA-03  
PROTECTION  
MONITOR  
FUNCTION  
CD  
SOURCE  
TUNER  
AUX  
1
TAPE  
POWER  
TONE  
OFF  
PHONES  
SPEAKERS  
A
BASS  
TREBLE  
BALANCE  
PHONO  
AUX  
2
OFF  
B
ON  
A+B  
 
English  
3
Figure 1: Controls and Connections  
Commandes et branchements  
Bedienelemente und Anschlüsse  
Controlli e collegamenti  
Controles y Conexiones  
De bedieningsorganen en de aansluitingen  
Funktioner och anslutningar  
RA-03  
PROTECTION  
MONITOR  
SOURCE  
FUNC  
TION  
CD  
TUNER  
PHONO  
AUX  
1
TAPE  
POWER  
PHONES  
TONE  
OFF  
BALANCE  
SPEAKERS  
A
BASS  
TREBLE  
AU  
X
2
OFF  
B
ON  
A+B  
12345 67 8 9 0 - = q  
p[]  
EXT REM  
IN  
IR  
OUT  
12V TRIGGER OUT  
DOUBLE INSULATION  
When servicing  
use only identical replacement parts  
1
2
SPEAKER IMPEDANCE  
INTEGRATED AMPLIFIER  
MODEL NO. RA-03  
POWER CONSUMPTION: 300W  
A AND B 8 OHMS MINIMUM  
PHONO  
CD  
TUNER  
AUX 1  
AUX 2  
TAPE  
GND  
SPEAKER A  
SPEAKER B  
LEFT  
RIGHT  
IN  
OUT  
RIGHT  
LEFT  
RIGHT  
LEFT  
WARNING  
DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE  
w e r t y u  
i
o
MUTE  
POWER  
PHO  
CD  
TUN  
AUX  
1
AUX  
2
TP 1  
TP 2  
VOLUME  
TUNING  
T/P  
1
4
7
2
5
3
6
8
9
0
10  
+10  
MEM  
MONO DIRECT BAND  
PTY  
TA  
TP  
DISPLAY  
RANDOM  
RR-AT94  
 
4
RA-03 Stereo Integrated Amplifier  
Figure 2: Signal Input and Speaker Output Connections  
Signaux d’entrée et branchements enceintes acoustiques  
Signaleingang und Anschluß eines Lautsprecherpaares  
Collegamenti dei segnali linea in ingresso, del registratore, dei diffusori  
Conexiones para Entrada de Señal y Salida a las Cajas Acústicas  
Het aansluiten van de lijnbronnen, een opname/weergaveapparaat en de luidsprekers  
Anslutningar för ingångssignalerna och högtalarutgångarna  
SPEAKERS  
ROTEL RA-03  
EXT REM  
IN  
IR  
OU  
12V TRIGGER OUT  
When servicin  
g
T
1
2
INTEGRATED AMPLIFIER  
A
OR B  
D
O
N
O
T
O
PE  
N
M
ODEL N  
O. RA-0  
3
NE PA  
S
OUVRI  
R
P
O
WER CO  
N
SUMPTION: 300W  
PH  
ON  
O
CD  
T
UNE  
R
A
UX  
1
A
UX  
2
TAPE  
PRE OUT  
GN  
D
SPEAKER  
A
SPEAKER  
B
LEFT  
RIGHT  
IN  
OUT  
RI  
GH  
T
LEFT  
RI  
GH  
T
LEFT  
WARNNG:  
RECORDER  
R
L
R
L
CD PLAYER  
R
L
OUTPUT  
PH  
0NO  
GN  
D
R
L
 
English  
5
The printed circuit boards (PCB) are designed  
withSymmetricalCircuitTraces. Thisinsuresthat  
the precise timing of the music is maintained  
and faithfully recreated. The RA-03 circuitry  
uses metal film resistors and polystyrene or  
polypropylene capacitors in important signal  
paths. All aspects of this design have been  
examined to ensure the most faithful music  
reproduction.  
Contents  
About Rotel  
Important Safety Instructions .................. 2  
A family whose passionate interest in music led  
them to manufacture high fidelity components  
of uncompromising quality founded Rotel over  
40 years ago. 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.  
Figure 1: Controls and Connections  
Figure 2: Signal Input and  
Speaker Output Connections  
3
4
About Rotel............................................ 5  
Getting Started....................................... 5  
The RR-AT94 Remote Control .................. 5  
The main functions of the RA-03 are easy to  
install and use. If you have experience with  
other stereo systems, you shouldn�t find any-  
thing perplexing. Simply plug in the associated  
components and enjoy.  
Remote Sensor  
A Few Precautions  
Placement  
6
6
6
6
5
The 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, semi  
conductors from Japan or the United States,  
while toroidal power transformers are manu-  
factured in Rotel�s own factory.  
Cables  
AC Power and Control ............................ 6  
AC Power Input  
Power Switch  
6
6
o
The RR-AT94 Remote Control  
and Power Indicator  
2\  
1
Some functions can be done with either the front  
panel controls, or the supplied RR-AT94 remote  
control. When these operations are described,  
the call out number for both controls is shown.  
For example, you can adjust the volume with  
Input Signal Connections.......................... 7  
Phono Input  
Line Level Inputs  
and Ground Connection  
7
7
e
w
r
Rotel�s reputation for excellence has been  
earned through hundreds of good reviews and  
awards from the most respected reviewers in  
the industry, who listen to music every day.  
Their comments keep the company true to its  
goal - the pursuit of equipment that is musical,  
reliable and affordable.  
Recorder Connections  
Preamp Outputs  
Speaker Outputs  
Speaker Selector Switch  
Speaker Selection  
Speaker Wire Selection  
Polarity and Phasing  
Speaker Connection  
............................. 7  
t
either the front panel Volume control  
or  
0
...................................... 7  
y
the remote control buttons  
.
a
and  
ui  
See the “IR Inputs and Output” section for more  
information on ways to expand the IR control  
capabilities of your system.  
.......................... 7  
6
7
7
7
7
All of us at Rotel, thank you for buying this  
product and hope it will bring you many hours  
of enjoyment.  
Note: Remove the batteries from the re-  
mote control if it will not be used for a long  
period of time. Do not leave run down bat-  
teries in the remote control. Exhausted bat-  
teries can leak corrosive chemicals which  
will damage the unit.  
Phones Output  
Audio Controls ........................................ 8  
......................................... 8  
4
Getting Started  
Volume Control  
Balance Control  
Tone On/Off Switch  
8
8
8
8
8
8
8
0a  
-
Thank you for purchasing the Rotel RA-03  
Stereo Integrated Amplifier. When used in a  
high-quality music audio system, it will provide  
years of musical enjoyment.  
NOTE: The RR-AT94 can be used to oper-  
ate the basic function of other certain other  
Rotel components, including Tuners, CD  
Players and DVD Players.  
9
Bass and Treble Controls  
78  
Function Control  
Monitor Control  
qs  
To operate a Rotel Tuner —  
The RA-03 is a full featured, high performance  
component. All aspects of the design have been  
optimized to retain the full dynamic range and  
subtle nuances of your music. The RA-03 has  
a highly regulated power supply incorporat-  
ing a Rotel custom-designed toroidal power  
transformer. This low impedance power supply  
has ample power reserves, which enables the  
RA-03 to easily reproduce the most demand-  
ing audio signals. This type of design is more  
expensive to manufacture, but it is better for  
the music.  
=
1) Select the tuner function of the RR-AT94.  
2) Press “Power” and “1” (RT-02) or “2”  
(RT-940AX).  
3) Press the key for Tuner operation.  
To operate a Rotel CD Player —  
Select the CD function of the RR-AT94  
To operate a Rotel DVD Player —  
Select the AUX 1 function of the RR-AT94.  
Mute Control  
d
IR Inputs and Outputs ............................. 8  
External Remote Input  
8
8
p
IR Output  
[
12 Volt Trigger Outlet  
Protection Circuitry  
...................... 9  
........................... 9  
]
3
Troubleshooting....................................... 9  
Power Indicator Is Not Lit  
Fuse Replacement  
No Sound  
9
9
9
Specifications ......................................... 9  
 
6
RA-03 Stereo Integrated Amplifier  
Remote Sensor  
Placement  
5
AC Power and Control  
The Remote Sensor picks up the 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 light, particu-  
larly sunlight. Certain types of lighting, such  
as halogen lights, that emit a fair amount of  
infrared light, can also interfere with proper  
operation. In addition remote control functions  
may not work reliably if the batteries in the  
RR-AT94 are weak.  
Like all audio components that handle low-  
level signals, the RA-03 can be affected by  
its environment. Avoid placing the RA-03 on  
top of other components. Also avoid routing  
audio signal cables near power cords. This  
will minimize the chance it will pick up hum  
or interference.  
AC Power Input  
o
The RA-03 does not draw high levels of current  
from the power outlet. However, whenever pos-  
sible, it should be plugged directly into a 2-pin  
polarized wall outlet. Do not use an extension  
cord. A heavy duty multi-tap power outlet strip  
maybeusedifit(andthewalloutlet)canhandle  
the current demanded by the RA-03 and all  
the other components connected to it.  
The RA-03 generates heat as part of its normal  
operation. The heat sinks and ventilation open-  
ings 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 reason-  
able airflow through the installation location,  
to prevent the amplifier from overheating.  
Your RA-03 is configured at the factory for the  
proper AC line voltage in the country where  
you purchased it (either 115 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 back panel.  
A Few Precautions  
WARNING: To avoid potential damage  
to your system, turn off ALL the components  
in the system when connecting or discon-  
necting the loudspeakers or any associated  
components. Do not turn the system com-  
ponents 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.  
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 RA-03 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.  
NOTE: Should you move your RA-03  
amplifier to another country, it is possible  
to reconfigure it for use on a different line  
voltage. Do not attempt to perform this con-  
version yourself. Opening the enclosure of  
the RA-03 exposes you to dangerous volt-  
ages. Consult a qualified service person  
or the Rotel factory service department for  
information.  
Please read this manual carefully. It provides  
information on how to incorporate the RA-03  
into your system as well as 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.  
Cables  
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.  
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 degrad-  
ing 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.  
Power Switch  
and  
2\  
Power Indicator  
1
Save the RA-03 shipping carton and all en-  
closed packing material for future use. Shipping  
or moving the RA-03 in anything other than  
the original packing material may result in  
severe damage to your amplifier.  
Press the front panel Power Switch  
button,  
2
to turn the RA-03 on. The Power Indicator  
light is illuminated when the RA-03 is on.  
1
Press Power Switch button again to turn the  
RA-03 off.  
Fill out and send in the owner�s registration  
card packed with the RA-03. 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.  
Once the RA-03 has been turned on with the  
front panel power switch, it can be switched  
between normal operating mode and standby  
mode with the Power button  
remote control.  
on the RR-AT94  
\
See the “12V Trigger Outlet” section for more  
information on ways you may be able to turn  
on and off other components in your system  
along with the RA-03.  
 
English  
7
Polarity and Phasing  
Input Signal Connections Preamp Outputs  
y
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.  
[See Figure 2.]  
The RA-03 has a set of preamp outputs. The  
signal from the source selected with the Func-  
tion Selector is always available from these  
outputs. Typically these outputs are used to  
provide a signal to another integrated ampli-  
fier or power amplifier, which is used to drive  
remote speakers  
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.  
Phono Input  
and  
e
Ground Connection  
NOTE: Changes to the settings of the  
Volume, Balance or Tone controls affect the  
signal from the Preamp Outputs.  
w
Plug the cable from the turntable into the ap-  
propriate 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.  
Speaker Outputs  
ui  
Speaker Selector Switch  
6
Line Level Inputs  
r
Speaker Connection  
[See Figure 2.]  
The CD, Tuner, and Aux inputs of the RA-03  
are “line level” inputs. These are for connect-  
ing components such as CD players, Hi Fi or  
NICAM Stereo video cassette recorders, tuners,  
Laser Disc players or the analog output from  
a CD ROM drive.  
Turn off all the components in the system before  
connecting the speakers. The RA-03 has color-  
coded binding post type speaker connectors on  
the back panel (except in European Community  
countrieswheretheiruseisnotpermitted). These  
connectors accept bare wire, connector lugs,  
or dual banana type connectors.  
The RA-03 has two sets of speaker outputs,  
labeled “A” and “B” . The speaker  
u i  
outputs are controlled by the switch  
the front panel.  
on  
6
Speaker Selection  
The Left and Right channels are labeled and  
should be connected to the corresponding  
channels of the source component. The Left  
connectors are white, the Right connectors  
are red. Use high quality RCA cables for  
connecting input source components to the  
RA-03. Ask your authorized Rotel dealer for  
advice about cables.  
If only one set of speakers will be used at any  
given time, the speakers may have an imped-  
ance as low as 4 ohms. If there are times when  
both the A and B speakers will be used, all  
the speakers should have an impedance of 8  
ohms or more. Speaker impedance ratings  
are less than precise. In practice, very few  
loudspeakers will present any problems for  
the RA-03. See your authorized Rotel dealer  
if you have any questions.  
Route the wire from the RA-03 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)  
thebindingpostthumbscrews. Placetheconnec-  
tor lug or wire around the binding post shaft.  
Turn the thumbscrews clockwise to clamp the  
connector lug or wire firmly in place.  
Recorder Connections  
t
[See Figure 2.]  
Speaker Wire Selection  
The Tape 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.  
Use insulated two-conductor stranded wire to  
connect the RA-03 to the speakers. The size  
and quality of the wire can have an audible  
effect on the performance of the system. Stan-  
dard 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.  
When connecting a recorder to the RA-03  
remember that the outputs of the recorder must  
be connected to the tape inputs of the RA-03.  
Similarly the tape outputs of the RA-03 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.  
NOTE: Be sure there are no loose wire  
strands that could touch adjacent wires or  
connectors.  
NOTE: The Tape Outputs are not affected  
by the Volume, Balance or Tone controls.  
They receive a fixed level signal.  
 
8
RA-03 Stereo Integrated Amplifier  
Tone On/Off Switch  
9
Mute Control  
d
Phones Output  
4
When the Tone Switch is in the Off position the  
Bass and Treble Control (Tone Control) circuits  
are bypassed to ensure the purest possible  
sound. Leave the Tone Switch in the Off posi-  
tion unless you want to use the Tone Controls.  
Turn the Tone Switch to the On position if you  
want to adjust the Tone Controls.  
Remote Only  
The Phones output allows you to connect  
headphones for private listening. This output  
accommodates standard stereo phone (1/4”)  
plugs. If your headphones have another type  
of plug, such as a 1/8” mini-plug, you will  
need an adapter plug. Contact your authorized  
Rotel dealer, to get the correct adapter plug.  
Plugging in a set of headphones does not cut  
off the signal to the outputs. Use the Speaker  
Selector to turn off the speakers. The settings  
of the Function Selector and the Tape Monitor  
Control determines which source is heard. To  
listen to or monitor the component connected  
to the Tape input set the Monitor Control to  
the Tape position. For all other inputs leave  
the Monitor Control in the Source position  
and select the source you want to listen to with  
the front panel Function Selector or press the  
corresponding source button on the remote  
control.  
To temporarily mute the sound of the system  
press the Mute Button on the RR-AT94 remote.  
The volume Control LED blinks when the sound  
is muted. Press the button again to return the  
sound volume to the original level.  
Bass and Treble Controls  
78  
IR Inputs and Outputs  
External Remote Input  
When the Tone Switch is in the On position,  
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.  
p
This 3.5 mm mini-jack (labeled EXT REM IN)  
receives command codes from an industry-  
standard infrared receivers (Xantech, etc.)  
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.  
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.  
NOTE: Because the sensitivity of speakers  
and headphones can vary widely, always  
reduce the volume level before connecting  
or disconnecting headphones.  
NOTE: The IR signals from the EXTERNAL  
REMOTE IN jack can be relayed to source  
components using external IR emitters or  
hardwired connections from the IR OUT  
jacks.  
Function Control  
qs  
The Function control selects the input signal  
source. The signal selected by the Function  
control is the one you hear, as long as the  
Monitor control is set to the Source postion.  
(See the following section.) The signal selected  
by the Function control also goes to Preamp  
Outputs and the Tape Outputs. Turn the front  
panel Listening Selector to the source you want  
to listen to. Or press the corresponding source  
button on the remote control.  
Audio Controls  
IR Output  
[
The IR OUT jack sends IR signals received at the  
EXTERNAL REM IN jack to an infrared emitter,  
or to Rotel CD players, cassette decks, or tuners  
with a compatible rear panel IR connector. The  
allows you to use IR control features to oper-  
ate other components when the IR sensors on  
those components are blocked for obstructed  
by installation in a cabinet.  
Volume Control  
0a  
Turn the control  
clockwise to increase the  
0
volume, or counterclockwise to decrease the  
volume. Or use the remote control volume  
buttons  
. Press the button to increase  
a
the volume, or the button to decrease the  
volume.  
Monitor Control  
=
See your authorized Rotel dealer for informa-  
tion on IR repeater systems.  
Balance Control  
-
When the Monitor Control is set to the Source  
position, the signal you hear, and which goes  
to the Preamp Outputs, is selected by the  
Function Control. To listen to the signal from a  
recorder connected to the Tape Inputs, set the  
Monitor Control to the Tape position. When  
the Monitor Control is in the Monitor position,  
the signal from the Tape Input also goes to the  
Preamp Outputs.  
The Balance Control adjusts the left-to-right  
balance of the sound output. Normally the  
control should be left in the center position.  
In some situations, typically when the main  
listening position is not ideally centered be-  
tween 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.  
NOTE: The EXT REM IN jack located next  
to the IR OUTPUT jack is for use with an  
external IR sensor which duplicates the  
front panel IR sensor.  
ThesignalthatgoestotheTapeOutputisalways  
selected by the Function Control. When you  
are recording with a unit that has monitoring  
capabilities, you can listen to the sound just  
recorded by setting the Monitor Control to the  
Monitor position.  
 
English  
9
Fuse Replacement  
12 Volt Trigger Outlet  
Troubleshooting  
]
If another electrical device works when plugged  
into the power outlet, but the Power Indicator  
of the RA-03 does not light when plugged  
into the same outlet and the Power Switch is  
pushed in, 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.  
Some audio components can be turned on  
automatically when they receive a 12V turn  
on “signal”. The 12V Trigger Outputs of the  
RA-03 provide the required signal. Connect  
compatible components to the RA-03 with a  
conventional 3.5mm miniplug cable. When the  
RA-03 is in Standby mode, the trigger signal  
is interupted, so the components controlled by  
it are turned off.  
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 RA-03 refer to the suggestions  
for the following conditions:  
No Sound  
Power Indicator Is Not Lit  
Check the signal source to see if it is function-  
ing properly. Make sure the cables from the  
signal source to the RA-03 inputs are connected  
properly. Be sure the Listening Selector is set  
to the proper input. Check the wiring between  
the RA-03 and the speakers.  
The Power Indicator should be lit whenever the  
RA-03 is plugged into the wall power outlet  
and the Power Switch is pushed in. 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.  
Protection Circuitry  
3
The RA-03 has both thermal and over-current  
protection circuitry that protects the amplifier  
againstdamageintheeventofextremeorfaulty  
operating conditions. The protection 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 shut down the amplifier  
if temperatures 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.  
Specifications  
Continuous Power Output  
60 watts/ch  
(20-20 kHz, < 0.03%, 8 ohms)  
Total Harmonic Distortion (20Hz-20kHz)  
< 0.03% at rated power, 1/2 power or 1 watt  
If this happens, turn the amplifier off. Let it  
cool down for several minutes, and attempt to  
identify and correct the problem that caused  
the protection circuitry to engage. When you  
turn the amplifier back on, the protection circuit  
will automatically reset and the indicator LED  
should go out.  
Intermodulation Distortion (60 Hz : 7 kHz, 4:1) < 0.03% at rated power, 1/2 power or 1 watt  
Frequency Response  
Phono Input  
Line Level Inputs  
20Hz-15kHz, ±0.3dB  
10Hz-100kHz, +1, –3dB  
Damping Factor (20-20,000 Hz, 8 ohms)  
180  
Input Sensitivity / Impedance  
Phono Input  
2.5mV / 47 kOhms  
150 mV / 24 kOhms  
In most cases, the protection circuitry activates  
because of a fault condition such as shorted  
speaker wires, or inadequate ventilation lead-  
ing to an overheating condition. In very rare  
cases, highly reactive or extremely low imped-  
ance speaker loads could cause the protection  
circuit to engage.  
Line Level Inputs  
Input Overload  
Phono Input  
180mV  
5V  
Line Level Inputs  
Premp Output / Impedance  
Tone Controls - Bass / Treble  
1V / 470 Ohms  
±6 dB at 100Hz / 10kHz  
Signal to Noise Ratio (IHF “A” weighted)  
Phono Input  
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.  
80 dB  
100 dB  
Line Level Inputs  
Power Requirements  
USA Version  
115 Volts, 60 Hz  
230 Volts, 50 Hz  
European Version  
Power Consumption  
300 W, 36 W - Idle, 3.7 W - Standby  
Dimensions (W x H x D)  
435 x 92 x 342 mm  
171/8 x 35/8 x 131/2”  
Panel Height  
Weight (net)  
80 mm / 31/16”  
7.7 kg, 17 lbs.  
All specifications are accurate at the time of printing.  
Rotel reserves the right to make improvements without notice.  
 
The Rotel Co. Ltd.  
10-10 Shinsen-Cho  
Shibuya-Ku  
Tokyo 150-0045  
Japan  
Phone: +81 3-5458-5325  
Fax: +81 3-5458-5310  
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)1903 221 600  
Fax: +44 (0)1903 221 525  
Rotel Deutschland  
Kleine Heide 12  
D-33790 Halle/Westf.  
Germany  
Phone: +49 05201-87170  
Fax: +49 05201-73370  
082 OMRA03 080904  
English • French • Deutsch • Italiano • Español • Nederlands • Svenska  
 

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