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
RB-1080 Stereo Power Amplifier
2
WARNING: There are no user serviceable parts inside. Refer all servicing to qualified service personnel.
WARNING: To reduce the risk of fire or electric shock,
do not expose the unit to moisture or water. Do not
allow foreign objects to get into the enclosure. If the
unit is exposed to moisture, or a foreign object gets
into the enclosure, immediately disconnect the power
cord from the wall. Take the unit to a qualified service person for inspection and necessary repairs.
Read all the instructions before connecting or operating the
component. Keep this manual so you can refer to these safety
instructions.
Heed all warnings and safety information in these instructions and on the product itself. Follow all operating instructions.
Clean the enclosure only with a dry cloth or a vacuum cleaner.
You must allow 10 cm or 4 inches of unobstructed clearance
around the unit. Do not place the unit on a bed, sofa, rug, or
similar surface that could block the ventilation slots. If the
component is placed in a bookcase or cabinet, there must be
ventilation of the cabinet to allow proper cooling.
Keep the component away from radiators, heat registers, stoves,
or any other appliance that produces heat.
The unit must be connected to a power supply only of the type
and voltage specified on the rear panel of the unit.
Connect the component to the power outlet only with the supplied power supply cable or an exact equivalent. Do not modify
the supplied cable in any way. Do not attempt to defeat grounding and/or polarization provisions. Do not use extension cords.
Do not route the power cord where it will be crushed, pinched,
bent at severe angles, exposed to heat, or damaged in any
way. Pay particular attention to the power cord at the plug
and where it exits the back of the unit.
The power cord should be unplugged from the wall outlet if
the unit is to be left unused for a long period of time.
Immediately stop using the component and have it inspected
and/or serviced by a qualified service agency if:
• The power supply cord or plug has been damaged.
• Objects have fallen or liquid has been spilled into the unit.
• The unit has been exposed to rain.
• The unit shows signs of improper operation
• The unit has been dropped or damaged in any way
Place the unit on a fixed, level surface strong enough to support its weight. Do not place it on a moveable cart that could
tip over.
3
English
Figure 1: Controls and Connections
Commandes et branchements
Bedienelemente und Anschlüsse
Controlli e collegamenti
Controles y Conexiones
De bedieningsorganen en aansluitingen
1
4
5
2
7
3
8
9 10
5
4
ON
RIGHT INPUT
BALANCED
UNBALANCED
POWER AMPLIFIER
MODEL NO. RB-1080
POWER CONSUMPTION: 550W
LEFT INPUT
BALANCED
OFF
BALANCED
IN
OUT
UNBALANCED
12V TRIGGER
UNBALANCED
AC FUSE
125V 12A
CAUTION
RIGHT SPEAKER
RISK OF ELECTRIC SHOCK
DO NOT OPEN
SPEAKER IMPEDANCE
LEFT SPEAKER
4 OHMS MINIMUM
CAUTION
– DISCONNECT
SUPPLY CORD BEFORE
REPLACING FUSE. REPLACE
WITH SAME TYPE FUSE.
WARNING: WARNING SHOCK HAZARD – DO NOT OPEN
AVIS: RISQUE DE CHOC ELECTRIQUE–NE PAS OUVRIR
WARNING:TO
SERIAL NO.
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.
REDUCE THE RISK
OF FIRE OR ELECTRICAL SHOCK,
DO NOT EXPOSE THIS EQUIPMENT
TO RAIN OR MOISTURE.
6
6
11
12
R B -1 0 8 0 Stereo Power Amplifier
4
Fig u r e 2 : S te r e o Co n n e ctio n s
B r a n ch e m e n t d e s e n tr Že s e t d e s e n ce in te s e n s tŽr Žo
A n s ch lu § d ia g r a m m b e i S te r e o b e tr ie b
Co lle g a m e n ti s te r e o - In g r e s s i e d if f u s o r i
Co n e x i—n d e la s e – a l d e e n tr a d a y la s ca ja s a cœs tica s
De cin ch - e n lu id s p r e k e r v e r b in d in g e n
PREAMPLIFIER
P R E A M P OU TP U TS
R
L
ROTEL RB-1080
ON
R IGH T IN P U T
B ALAN C E D
U N B ALAN C E D
P OW E R A M P L IF IE R
M OD E L N O. R B -1 0 8 0
P OW E R C ON S U M P TION : 5 5 0 W
LE FT IN P U T
B ALAN C E D
IN
OFF
OU T
U N B ALAN C E D
1 2 V TR IGGE R
B ALAN C E D
U N B ALAN C E D
AC FU S E
125V 12A
CAUTION
S P E A K E R IM P E DA N C E
R IGH T S P E A K E R
LE FT S P E A K E R
4 OH M S M IN IM U M
RISK OF ELECTRIC SHOCK
DO NOT OPEN
C A U T ION
Ð DIS C ON N E C T
S U P P LY C OR D B E F OR E
R E P L A C IN G F U S E . R E P L A C E
W IT H S A M E T Y P E F U S E .
WARNING: WARNING SHOCK HAZARD Ð DO NOT OPEN
AVIS: RISQUE DE CHOC ELECTRIQUEÐNE PAS OUVRIR
W A R N IN G: T O
R E DU C E T H E R IS K
OF F IR E OR E L E C T R IC A L S H OC K ,
D O N OT E X P OS E T H IS E QU IP M E N T
TO R AIN OR M OIS TU R E .
S E R IA L N O.
AT T E N T ION Ð DE B R A N C H E R
AVA N T DE R E M P L A C E R L E
F U S IB L E .
U T IL IS E R U N F U S IB L E DE
R E C H A N GE DE M æM E T Y P E .
M a nufa c t ued under lic ens e fr om
L uc a s film L t d. L uc a s film a nd T H X
a r e r egis t er ed t r a dem a r ks of
L uc a s film L t d.
Fig u r e 3 : B a la n ce d In p u ts Co n n e ctio n
B r a n ch e m e n t d e s e n tr Že s s y m Žtr iq u e s
A n s ch lu § d ia g r a m m (S y m m e tr is ch e Ein g Š n g e )
Co lle g a m e n to in g r e s s i b ila n cia ti
En tr a d a s B a la n ce a d a s
De g e b a la n ce e r d e in g a n g e n
PREAMPLIFIER
P R E A M P OU TP U TS
R
L
ROTEL RB-1080
ON
R IGH T IN P U T
B ALAN C E D
U N B ALAN C E D
P OW E R A M P L IF IE R
M OD E L N O. R B -1 0 8 0
P OW E R C ON S U M P TION : 5 5 0 W
LE FT IN P U T
B ALAN C E D
OFF
B ALAN C E D
IN
OU T
U N B ALAN C E D
1 2 V TR IGGE R
U N B ALAN C E D
AC FU S E
125V 12A
CAUTION
R IGH T S P E A K E R
RISK OF ELECTRIC SHOCK
DO NOT OPEN
S P E A K E R IM P E DA N C E
4 OH M S M IN IM U M
C A U T ION
W A R N IN G: T O
S E R IA L N O.
LE FT S P E A K E R
Ð DIS C ON N E C T
S U P P LY C OR D B E F OR E
R E P L A C IN G F U S E . R E P L A C E
W IT H S A M E T Y P E F U S E .
WARNING: WARNING SHOCK HAZARD Ð DO NOT OPEN
AVIS: RISQUE DE CHOC ELECTRIQUEÐNE PAS OUVRIR
R E DU C E T H E R IS K
OF F IR E OR E L E C T R IC A L S H OC K ,
D O N OT E X P OS E T H IS E QU IP M E N T
TO R AIN OR M OIS TU R E .
M a nufa c t ued under lic ens e fr om
L uc a s film L t d. L uc a s film a nd T H X
a r e r egis t er ed t r a dem a r ks of
L uc a s film L t d.
AT T E N T ION Ð DE B R A N C H E R
AVA N T DE R E M P L A C E R L E
F U S IB L E .
U T IL IS E R U N F U S IB L E DE
R E C H A N GE DE M æM E T Y P E .
5
Contents
Figure 1: Controls and Connections
Figure 2: Stereo Connections
Figure 4: Balanced Input Connection
About Rotel
3
4
4
Contents ............................................... 5
About Rotel .......................................... 5
Getting Started ..................................... 5
A Few Precautions
Placement
About THX Ultra™
5
6
6
AC Power and Control ........................... 6
AC Power Input
Power Switch
and Power Indicator
Trigger ON/OFF Mode Selector
12V Trigger Input
and Output
Protection Circuitry
6
6
6
6
7
Input Signal Connections ........................ 7
Input Selector Switch
RCA Inputs (unbalanced)
XLR Inputs (balanced)
7
7
7
Speaker Connection ............................... 7
Speaker Selection
Speaker Wire Selection
Polarity and Phasing
Speaker Connection
7
7
7
8
Troubleshooting ..................................... 8
Front Panel Power Indicator Is Not Lit
Fuse Replacement
No Sound
Protection Indicator Is Lit
8
8
8
8
Specifications ........................................ 8
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.
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 manufactured in Rotel’s own factory.
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.
All of us at Rotel thank you for buying this
product and hope it will bring you many hours
of enjoyment.
Getting Started
Thank you for purchasing the Rotel RB-1080
Stereo Power Amplifier. When used in a highquality music or home theater system, your
Rotel amplifier will provide years of musical
enjoyment.
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-1080 to drive the most demanding loudspeakers.
Be aware that the RB-1080 is capable of high
power levels, in excess of 200 watts per channel. Make sure that your speakers can handle
the power of the RB-1080. If in doubt about
your speakers, ask your local Rotel audio
dealer for advice.
The RB-1080 is straightforward in its installation 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 offer these low-noise XLR-connections. If you
choose this option, you will need to reset a
back panel switch selecting the balanced inputs. Again, nothing very confusing.
A Few Precautions
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 general information that will help you get optimum performance from your system. Please
contact your authorized Rotel audio dealer
for answers to any questions you might have.
In addition, all of us at Rotel welcome your
questions and comments.
Save the RB-1080 shipping carton and all enclosed packing material for future use. Shipping or moving the RB-1080 in anything other
than the original packing material may result in severe damage to your amplifier.
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.
RB-1080 Stereo Power Amplifier
Placement
The RB-1080 generates heat as part of its normal 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 chassis, and reasonable airflow through the installation location, to prevent the amplifier from
overheating.
Likewise, remember the weight of the amplifier when you select an installation location.
Make sure that the shelf or cabinet can support its considerable bulk. Again, use common sense.
About THX Ultra™
THX is an exclusive set of standards and technologies established by the world-renowned
film production company, Lucasfilm Ltd. THX
grew from George Lucas’ personal desire to
make your experience of the film soundtrack,
in both movie theaters and in your home theater, as faithful as possible to what the director intended.
Movie sound tracks are mixed in special movie
theaters called dubbing stages and are designed to be played back in movie theaters
with similar equipment and conditions. The
soundtrack created for movie theaters is then
transferred directly onto Laserdisc, VHS tape,
DVD, etc., and is not changed for playback
in a small home theater environment. THX
engineers developed patented technologies
to accurately translate the sound from the movie
theater environment into the home, correcting the tonal and spatial errors that occur.
Before any home theater component can be
THX Ultra certified, it must incorporate the THX
technologies and also pass a rigorous series
of quality and performance tests. Only then
can a product feature the THX Ultra logo, which
is your guarantee that the Home Theater products you purchase will give you superb performance for many years to come.
THX and the THX logo are trademarks of
Lucasfilm Ltd. All rights reserved.
6
AC Power and Control
AC Power Input
Because of its high power rating, the RB-1080
can draw considerable current. Therefore, it
should be plugged directly into a 3-pin polarized 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 connected to it.
Be sure the Power Switch on the front panel
of the RB-1080 is turned off (in the out position). Then, connect the supplied power cord
on the back panel
to the Power Connector
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.
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.
If you are going to be away from home for
an extended period of time such as a monthlong vacation, it is a sensible precaution to
unplug your amplifier (as well as other audio and video components) while you are
away.
Power Switch
Indicator
and Power
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 position.
Trigger ON/OFF
Mode Selector
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.
With the switch in the +12V TRIGGER ON
position, the amplifier is turned on automatically 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.
12V Trigger Input
and Output
The jack labeled IN is for connecting the 3.5mm
Plug/Cable carrying a +12 volt trigger 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.
The jack labeled OUT is for connecting another 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.
7
Protection Circuitry
The RB-1080 features a thermal protection circuit that protects the amplifier against potential
damage in the event of extreme or faulty
operating conditions. Unlike many designs,
the RB-1080’s protection circuit is independent 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 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.
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.
In most cases, the protection circuitry activates
because of a fault condition such as shorted
speaker wires, or inadequate ventilation leading to an overheating condition. In very rare
cases, highly reactive or extremely low impedance speaker loads could cause the protection 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.
Input Signal Connections
The RB-1080 gives you a choice of two different kinds of input connections – conventional 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.
NOTE: To prevent loud potentially damaging noises, make sure the amplifier is
turned off when you make any changes to
the input signal configuration.
Input Selector Switch
Set the switch to 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.
RCA Inputs (unbalanced)
See Figure 2
When a component with RCA connectors –
such as a preamplifier or surround sound processor – supplies signals to the RB-1080, the
RCA-type phono plug inputs should be used.
Select high quality audio interconnect cables.
Connect each of the outputs from the preamplifier or signal processor to the corresponding Unbalanced Input of the RB-1080.
XLR Inputs (balanced)
English
Speaker Connection
Speaker Selection
We recommend using loudspeakers with a
nominal impedance of 4 ohms or higher with
the RB-1080. You should exercise some caution 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.
Speaker Wire Selection
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. Standard 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 appropriate cables for your system.
See Figure 3
Polarity and Phasing
If you are using one of the high-end preamplifiers or processors with low-noise balanced
signal outputs to drive your RB-1080, you may
choose to use these low-noise XLR-type connections. See your authorized Rotel dealer for
the appropriate cables.
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 mistakenly 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.
Connect XLR audio interconnect cables from
each of the outputs from the preamplifier or
signal processor to the corresponding Balanced Input of the RB-1080.
RB-1080 Stereo Power Amplifier
Speaker Connection
The RB-1080 has two pairs of color coded
binding posts on the back panel. These connectors accept bare wire, connector lugs, or
dual banana type connectors (except in the
European Community countries where their
use is not permitted).
Route the wire from the RB-1080 to the speakers. Give yourself enough slack so you can
move the components enough 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 hexagonal 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 back the insulation from
the end of each conductor. Be careful not to
cut into the wire strands. Unscrew (turn counterclockwise) the binding post hexagonal
thumbscrews. Place the connector lug or wire
around the binding post shaft. Turn the hexagonal thumbscrews clockwise to clamp the
connector lug or wire firmly in place.
8
Front Panel Power Indicator
Is Not Lit
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 connections 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
on the back
and remove the fuse holder
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 (3AG125V12A
for U.S. version or 5ST6.3 for European
version).
No Sound
If the amp is getting AC power, but is producing no sound, check the Protection indicator 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.
Protection Indicator Is 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 protection devices. If the problem is not corrected
or reoccurs, there is a problem with the system or the amplifier itself.
Note: Be sure there are no loose wire
strands that could touch adjacent wires or
connectors.
Troubleshooting
Most difficulties in audio systems are the result of poor or wrong 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 RB-1080, refer
to the suggestions for the following conditions:
Specifications
Continuous Power Output (20-20 kHz, < 0.03%)
200 watts/ch into 8 ohms
Total Harmonic Distortion (20Hz-20kHz, 8 ohms)
< 0.03%
Intermodulation Distortion (60 Hz : 7 kHz, 4:1)
< 0.03%
Frequency Response (+0.5 dB, -3 dB)
15Hz-100kHz
Damping Factor (20-20,000 Hz, 8 ohms)
1000
Speaker Impedance
4 ohms minimum
Signal to Noise Ratio (IHF A network)
116 dB
Input Impedance/Sensitivity
32 k Ohms/1.5 volt
Power Requirements
115 Volts, 60 Hz (U.S. version)
230 Volts, 50 Hz (European version)
Power Consumption
550 Watts
Dimensions (W x H x D)
430 x 139 x 400 mm
17 15/16 x 5 1/2 x 15 3/4 in
Weight (net)
16.8 kg, 37.03 lb.
All specifications are accurate at the time of printing.
Rotel reser ves 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
Meadow Road
Worthing, West Sussex BN11 2RX
England
Phone: +44 (0)1903 524 813
Fax: +44 (0)1903 524 831
Rotel Deutschland
Kleine Heide 12
D-33790 Halle/Westf.
Germany
Phone: +49 05201-87170
Fax: +49 05201-73370
www.rotel.com
082 OMRB-1080 073100