Owner’s Manual
Manuel d’utilisation
Bedienungsanleitung
Manuale di Istruzioni
Manual de Instrucciones
Gebruiksaanwijzing
RB-1080
Stereo Power Amplifier
Amplificateur De Puissance Stéréo
Stereo-Endstufe
Finale di Potenza Stereo
Etapa de Potencia Estereofónica
Stereo Eindversterker
POWER AMPLIFIER
RB-1080
BRIDGED MONO
PROTECTION
POWER
3
English
Figure 1: Controls and Connections
Commandes et branchements
Bedienelemente und Anschlüsse
Controlli e collegamenti
Controles y Conexiones
De bedieningsorganen en aansluitingen
POWER AMPLIFIER
RB-1080
BRIDGED MONO
PROTECTION
POWER
1
2
3
4
5
6
8
9
10 11
6
5
ON
RIGHT INPUT
BALANCED
LEFT INPUT
BALANCED
POWER AMPLIFIER
MODEL NO. RB-1080
POWER CONSUMPTION: 550W
IN
OUT
OFF
UNBALANCED
UNBALANCED
12V TRIGGER
BALANCED
UNBALANCED
AC FUSE
125V 12A
SPEAKER IMPEDANCE
4 OHMS MINIMUM
RIGHT SPEAKER
LEFT SPEAKER
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION DISCONNECT
REPLACING FUSE. REPLACE
WITH SAME TYPE FUSE.
–
SUPPLY CORD BEFORE
WARNING:WARNING SHOCK HAZARD
AVIS: RISQUE DE CHOC ELECTRIQUE–NE PAS OUVRIR
–
DO NOT OPEN
ATTENTION
–
DEBRANCHER
AVANT DE REMPLACER LE
FUSIBLE.
UTILISER UN FUSIBLE DE
RECHANGE DE MÊME TYPE.
Manufactued under license from
Lucasfilm Ltd. Lucasfilm and THX
are registered trademarks of
Lucasfilm Ltd.
WARNING:TO REDUCE THE RISK
OF FIRE OR ELECTRICAL SHOCK,
DO NOT EXPOSE THIS EQUIPMENT
TO RAIN OR MOISTURE.
SERIAL NO.
7
7
12
13
4
RB-1080 Stereo Power Amplifier
Figure 2: Stereo Connections
Branchement des entrées et des enceintes en stéréo
Anschlußdiagramm bei Stereobetrieb
Collegamenti stereo - Ingressi e diffusori
Conexión de la señal de entrada y las cajas acústicas
De cinch- en luidsprekerverbindingen
PREAMPLIFIER
PREAMP OUTPUTS
L
R
ROTEL RB-1080
ON
RIGHT INPUT
LEFT INPUT
BALANCED
BALANCED
POWER AMPLIFIER
MODEL NO. RB-1080
POWER CONSUMPTION: 550W
IN
OUT
OFF
UNBALANCED
UNBALANCED
12V TRIGGER
BALANCED
UNBALANCED
AC FUSE
125V 12A
SPEAKER IMPEDANCE
RIGHT SPEAKER
LEFT SPEAKER
CAUTION
4
OHMS MINIMUM
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION DISCONNECT
REPLACING FUSE. REPLACE
WITH SAME TYPE FUSE.
–
SUPPLY CORD BEFORE
WARNING:WARNING SHOCK HAZARD
AVIS: RISQUE DE CHOC ELECTRIQUE–NE PAS OUVRIR
–
DO NOT OPEN
ATTENTION
–
DEBRANCHER
AVANT DE REMPLACER LE
FUSIBLE.
UTILISER UN FUSIBLE DE
RECHANGE DE MÊME TYPE.
WARNING:TO REDUCE THE RISK
OF FIRE OR ELECTRICAL SHOCK,
DO NOT EXPOSE THIS EQUIPMENT
TO RAIN OR MOISTURE.
Manufactued under license from
Lucasfilm Ltd. Lucasfilm and THX
are registered trademarks of
Lucasfilm Ltd.
SERIAL NO.
Figure 3: Balanced Inputs Connection
Branchement des entrées symétriques
Anschlußdiagramm (Symmetrische Eingänge)
Collegamento ingressi bilanciati
Entradas Balanceadas
De gebalanceerde ingangen
PREAMPLIFIER
PREAMP OUTPUTS
R
L
ROTEL RB-1080
ON
RIGHT INPUT
LEFT INPUT
BALANCED
BALANCED
POWER AMPLIFIER
MODEL NO. RB-1080
POWER CONSUMPTION: 550W
IN
OUT
OFF
UNBALANCED
UNBALANCED
12V TRIGGER
BALANCED
UNBALANCED
AC FUSE
125V 12A
SPEAKER IMPEDANCE
RIGHT SPEAKER
LEFT SPEAKER
CAUTION
4
OHMS MINIMUM
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION DISCONNECT
REPLACING FUSE. REPLACE
WITH SAME TYPE FUSE.
–
SUPPLY CORD BEFORE
WARNING:WARNING SHOCK HAZARD
AVIS: RISQUE DE CHOC ELECTRIQUE–NE PAS OUVRIR
–
DO NOT OPEN
ATTENTION
–
DEBRANCHER
AVANT DE REMPLACER LE
FUSIBLE.
UTILISER UN FUSIBLE DE
RECHANGE DE MÊME TYPE.
WARNING:TO REDUCE THE RISK
OF FIRE OR ELECTRICAL SHOCK,
DO NOT EXPOSE THIS EQUIPMENT
TO RAIN OR MOISTURE.
Manufactued under license from
Lucasfilm Ltd. Lucasfilm and THX
are registered trademarks of
Lucasfilm Ltd.
SERIAL NO.
5
English
The RB-1080 is a high-power, two-channel
power amplifier, providing the highest level
of audio performance. Discrete output devices,
a massive power supply, premium components,
and Rotel’s Balanced Design ensure superb
sound quality. High current capability allows
the RB-991 to drive the most demanding loud-
speakers.
Contents
Figure 1: Controls and Connections
About Rotel
3
4
4
A family whose passionate interest in music
led them to manufacture high fidelity compo-
nents 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 employ-
ees.
Figure 2: Stereo Connections
Figure 4: Balanced Input Connection
Contents ............................................... 5
About Rotel .......................................... 5
Getting Started ..................................... 5
Be aware that the RB-1080 is capable of high
power levels, in excess of 200 watts per chan-
nel. Make sure that your speakers can handle
the power of the RB-1080. If in doubt about
your speakers, ask your local Rotel audio
retailer for advice.
The engineers work as a close team, listen-
ing 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 ca-
pacitors from the United Kingdom and Ger-
many, semi conductors from Japan or the
United States, while toroidal power transform-
ers are manufactured in Rotel’s own factory.
A Few Precautions
Placement
5
6
The RB-1080 is straightforward in its instal-
lation and operation. If you have experience
with other stereo power amplifiers, you
shouldn’t find anything perplexing. Plug in a
pair of high-quality RCA cables from your
preamp into the amplifier inputs, wire up your
speakers, and enjoy. Alternatively, the RB-1080
provides an optional pair of balanced inputs
for use with preamps or processors that of-
fer these low-noise XLR-connections. If you
choose this option, you will need to reset a
back panel switch selecting the balanced in-
puts. Again, nothing very confusing.
AC Power and Control ........................... 6
AC Power Input
Power Switch
6
6
6
6
6
and Power Indicator
Trigger ON/OFF Mode Selector
12V Trigger Input
Protection Circuitry
and Output
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 musi-
cal, reliable and affordable.
Input Signal Connections ........................ 7
Input Selector Switch
RCA Inputs (unbalanced)
XLR Inputs (balanced)
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7
A Few Precautions
All of us at Rotel thank you for buying this
product and hope it will bring you many hours
of enjoyment.
Please read this manual carefully. In addition
to basic installation and operating instructions,
it provides valuable information on various
RB-1080 system configurations as well as gen-
eral information that will help you get opti-
mum performance from your system. Please
contact your authorized Rotel audio retailer
for answers to any questions you might have.
In addition, all of us at Rotel welcome your
questions and comments.
Speaker Connection ............................... 7
Speaker Selection
7
7
7
7
Speaker Wire Selection
Polarity and Phasing
Speaker Connection
Getting Started
Thank you for purchasing the Rotel RB-1080
Stereo Power Amplifier. When used in a high-
quality music or home theater system, your
Rotel amplifier will provide years of musical
enjoyment.
Troubleshooting ..................................... 8
Front Panel Power Indicator Is Not Lit
Fuse Replacement
8
8
8
8
Save the RB-1080 shipping carton and all en-
closed packing material for future use. Ship-
ping or moving the RB-1080 in anything other
than the original packing material may re-
sult in severe damage to your amplifier.
No Sound
Protection Indicator Is Lit
Specifications ........................................ 8
Fill out and send in the owner’s registration
card packed with the RB-1080. 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.
6
RB-1080 Stereo Power Amplifier
Placement
12V Trigger Input
and Output
Note: Should you move your RB-1080
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 RB-1080 exposes you
to dangerous voltages. Consult a qualified
service person or the Rotel factory service
department for information.
The RB-1080 generates heat as part of its nor-
mal operation. The heat sinks and ventilation
openings 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 chas-
sis, and reasonable airflow through the in-
stallation location, to prevent the amplifier from
overheating.
The jack labeled IN is for connecting the
3.5mm Plug/Cable carrying a +12 volt trig-
ger signal to turn the amplifier on and off.
To use this feature the toggle switch must be
set to the ON position. This input accepts any
control signal (AC or DC) ranging from 3 volts
to 30 volts.
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 au-
dio and video components) while you are
away.
The jack labeled OUT is for connecting an-
other 3.5mm plug/cable to provide a 12V
trigger signal to other components. The 12V
output signal is available whenever a +12 volt
trigger signal is applied to the IN connector.
Likewise, remember the weight of the ampli-
fier when you select an installation location.
Make sure that the shelf or cabinet can sup-
port its considerable bulk. Again, use com-
mon sense.
Protection Circuitry
Power Switch
Indicator
and Power
The RB-1080 features a thermal protection cir-
cuit that protects the amplifier against potential
damage in the event of extreme or faulty
operating conditions. Unlike many designs,
the RB-108 0’s protection circuit is indepen-
dent of the audio signal and has no impact
on sonic performance. Instead, the protection
circuit monitors the temperature of the output
devices and shuts down the amplifier if tem-
peratures exceed safe limits.
AC Power and Control
The power switch is located on the front panel
of your amplifier. To turn the amplifier on, push
the switch in. The LED indicator above the
switch will light, indicating that the amplifier
is turned on. To turn the amplifier off, push
the button again and return it to the out po-
sition.
AC Power Input
Because of its high power rating, the RB-1080
can draw considerable current. Therefore, it
should be plugged directly into a 2-pin po-
larized wall outlet. Do not use an extension
cord. 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
RB-1080 and all the other components con-
nected to it.
Trigger ON/OFF
Mode Selector
Most likely, you will never see this protection
circuitry in action. However, should a faulty
condition arise, the amplifier will stop play-
ing and the LED indicator on the front panel
will light up.
The Amplifier provides the option for manual
or automatic power on/off operation. These
modes are selectable using a toggle switch
on the back panel.
Be sure the Power Switch on the front panel
of the RMB-1095 is turned off (in the out po-
sition). Then, connect the supplied power cord
If this happens, turn the amplifier off, let it cool
down for several minutes, and attempt to iden-
tify 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.
to the Power Connector
on the back panel
With the switch in the +12V TRIGGER ON
position, the amplifier is turned on automati-
cally when a 12V trigger signal is present at
the 3.5 mm Jack of TRIGGER IN on the rear
panel. The amplifier will go into standby mode
if the +12V signal is not present. The front panel
POWER SWITCH overrides this function. It must
be ON for the +12V trigger to work. Turning
the switch OFF cuts power to the amplifier,
regardless of whether or not a trigger signal
is present.
of the amplifier and to the AC power outlet.
Your RB-1080 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.
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 im-
pedance speaker loads could cause the pro-
tection circuit to engage.
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.
7
English
Speaker Connection
Input Signal Connections
Speaker Connection
The RB-1080 has two pairs of color coded
binding posts on the back panel. These con-
nectors accept bare wire, connector lugs, or
dual banana type connectors (except in the
European Community countries where their
use is not permitted).
The RB-1080 gives you a choice of two dif-
ferent kinds of input connections – conven-
tional unbalanced RCA type connections (such
as found on nearly all audio equipment) or
balanced XLR-type connections for use with
some high-end preamps or digital processors
featuring this lower noise connection.
Speaker Selection
We recommend using loudspeakers with a
nominal impedance of 4 ohms or higher with
the RB-1080. You should exercise some cau-
tion in driving multiple pairs of speakers in
parallel configuration, because the effective
impedance the amplifier sees is cut in half.
For example, when driving two pair of 8 ohm
speakers, the amplifier sees a 4 ohm load.
When driving multiple speakers in parallel,
it is recommended that you select speakers
with a nominal impedance of 8 ohms or higher.
Speaker impedance ratings are less than
precise. In practice, very few loudspeakers will
present any problems for the RB-1080. See
your authorized Rotel dealer if you have any
questions.
Route the wire from the RB-1080 to the speak-
ers. Give yourself enough slack so you can
move the components enough to allow access
to the speaker connectors.
NOTE: To prevent loud potentially damag-
ing noises, make sure the amplifier is
turned off when you make any changes to
the input signal configuration.
If you are using dual banana plugs, connect
them to the wires and then plug into the backs
of the binding posts. The hexagonal thumb-
screws of the binding posts should be screwed
in all the way (clockwise).
Input Selector Switch
Set the switch select the inputs that are being
used. Set it to Unbalanced if the RCA inputs
are used. Set it to Balanced if the XLR inputs
are used.
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 back the insulation from
the end of each conductor. Be careful not to
cut into the wire strands. Unscrew (turn coun-
terclockwise) the binding post hexagonal
thumbscrews. Place the connector lug or wire
around the binding post shaft. Turn the hex-
agonal thumbscrews clockwise to clamp the
connector lug or wire firmly in place.
Speaker Wire Selection
RCA Inputs (unbalanced)
Use insulated two-conductor stranded wire to
connect the RB-1080 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 spe-
cial high-quality speaker cables. Your autho-
rized Rotel dealer can help in the selection
of appropriate cables for your system.
See Figure 2
When a component with RCA connectors –
such as a preamplifier or surround sound pro-
cessor – supplies signals to the RB-1080, the
RCA-type phono plug inputs should be used.
Note: Be sure there are no loose wire
strands that could touch adjacent wires or
connectors.
Select high quality audio interconnect cables.
Connect each of the outputs from the pream-
plifier or signal processor to the correspond-
ing Unbalanced Input of the RB-1080.
XLR Inputs (balanced)
Polarity and Phasing
See Figure 3
The polarity — the positive/negative orien-
tation of the connections — for every speaker
and amplifier connection must be consistent
so all the speakers will be in phase. If the po-
larity of one connection is mistakenly reversed,
bass output will be very weak and stereo im-
aging 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 insula-
tion 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.
If you are using one of the high-end pream-
plifiers or processors with low-noise balanced
signal outputs to drive your RB-1080, you may
choose to use these low-noise XLR-type con-
nections. See your authorized Rotel dealer for
the appropriate cables.
Connect XLR audio interconnect cables from
each of the outputs from the preamplifier or
signal processor to the corresponding Bal-
anced Input of the RB-1080.
8
RB-1080 Stereo Power Amplifier
No Sound
Troubleshooting
If the amp is getting AC power, but is pro-
ducing no sound, check the Protection indi-
cator on the front panel. If it is lit, see below.
If not, check all of your connections and control
settings on associated components. Check the
input selector switch on the RB-1080 back
panel to be sure that its setting matches the
type of input you are using.
Most difficulties in audio systems are the re-
sult of poor or wrong connections, or improper
control settings. If you encounter problems,
isolate the area of the difficulty, check the con-
trol settings, determine the cause of the fault
and make the necessary changes. If you are
unable to get sound from the RB-1080, refer
to the suggestions for the following conditions:
Protection Indicator Is Lit
Front Panel Power Indicator
Is Not Lit
The front panel indicator lights when the
RB-1080 protection circuits have shut off the
amplifier. Typically, this occurs only when the
ventilation openings are blocked, when there
is faulty speaker wiring, or after a period of
extreme use. Turn off the system and wait for
the amp to cool. Then push the front panel
power switch in and out to reset the protec-
tion devices. If the problem is not corrected
or reoccurs, there is a problem with the sys-
tem or the amplifier itself.
No main power to the RB-1080. Check the
front panel power switch. Make sure that it
is set to the on position. Check AC power con-
nections at the amplifier and the AC outlet.
Fuse Replacement
If everything checks out correctly and you still
cannot get the amplifier to turn on, check for
a blown fuse. Disconnect the AC from the wall
and remove the fuse holder
on the back
panel. If the fuse is blown, replace with a new
fuse and try again.
Note: Make sure that the power cord is
disconnected from the wall before checking
or replacing the fuse. Replace only with the
identical size and type fuse (10 amp
AGC).
Specifications
Continuous Power Output (20-20 kHz, < 0.03%)
Total Harmonic Distortion (20Hz-20kHz, 8 ohms)
Intermodulation Distortion (60 Hz : 7 kHz, 4:1)
Frequency Response (+0.5 dB, -3 dB)
Damping Factor (20-20,000 Hz, 8 ohms)
Speaker Impedance
200 watts/ch into 8 ohms
< 0.03%
< 0.03%
15Hz-100kHz
1000
4 ohms minimum
116 dB
Signal to Noise Ratio (IHF A network)
Input Impedance/Sensitivity
32 k Ohms/1.5volt
Power Requirements
115 Volts, 60 Hz (U.S. version)
230 Volts, 50 Hz (European version)
Power Consumption
5500 Watts
Dimensions (W x H x D)
430 x 121 x 385 mm
173/8 x 43/4 x 153/16 in
Weight (net)
15.5 kg, 34.1 lb.
All specifications are accurate at the time of printing.
Rotel reserves the right to make improvements without notice.
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