Rotel RMB-1575 Owners manual
Ownerʼs Manual
RMB-1565 / RMB-1575
Five Channel Power Amplifi ers
Fünfkanal-Endstufen
5-kanalen eindversterker
5-канальный усилитель мощности
Bedienungsanleitung
Gebruiksaanwijzing
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Register your product at
www.Rotel.com/register
2
Important Safety Instructions
RMB-1565 / RMB-1575 Five Channel Power Amplifi ers
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 expose the
unit to dripping or splashing. Do not place objects filled with
liquids, such as vases, on the unit. 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.
Do not use this unit near water.
You must allow a minimum 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 openings. If the unit 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.
WARNING: The rear panel power cord connector is the mains
power disconnect device. The apparatus must be located in an
open area that allows access to the cord connector.
The unit must be connected to a power supply only of the type
and voltage specified on the rear panel. (USA: 120 V/60Hz, EC:
230V/50Hz)
Connect the component to the power outlet only with the
supplied power supply cable or an exact equivalent. Do not
modify the supplied cable. A polarized plug has two blades, with
one wider than the other. A grounding plug has two blades plus
a third grounding prong. These are provided for your safety.
Do not defeat grounding and/or polarization safety provisions.
If the supplied plug does not fit your outlet, please consult an
electrician for replacement of the obsolete outlet. Do not use
extension cords.
The main plug of the power cord set is a disconnect device of the
apparatus. In order to completely disconnect the apparatus from
the supply mains, the main plug of the power cord set should
be unplugged from the mains (AC) outlet. The standby LED
indicator will not be lit up to show the power cord is unplugged.
The disconnect device shall remain readily accessible.
Do not route the power cord where it will be crushed, pinched,
bent, exposed to heat, or damaged in any way. Pay particular
attention to the power cord at the plug and where the cord exits
the back of the unit.
The power cord should be unplugged from the wall outlet during
a lightning storm or if the unit is to be left unused for a long
period of time.
Use only accessories specified by the manufacturer.
Use only with a cart, stand, rack, bracket
or shelf system recommended by Rotel. Use
caution when moving the unit in a stand or
rack to avoid injury from a tip-over.
Use Class 2 Wiring when connecting the speaker terminals of
the unit to ensure proper insulation and minimise the risk of
electrical shock.
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
Rotel products are designed to comply with
international directives on the Restriction of
Hazardous Substances (RoHS) in electrical and
electronic equipment and the disposal of Waste
Electrical and Electronic Equipment (WEEE). The
crossed wheelie bin symbol indicates compliance
and that the products must be appropriately
recycled or processed in accordance with these
directives.
This symbol means that this unit is double insulated.
An earth connection is not required.
Figure 1: Controls and Connections
Bedienelemente und Anschlüsse
De bedieningsorganen en de aansluitingen
Органы управления и разъемы
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Figure 2: Preamp Input and Speaker Output Connections
Anschlussdiagramm
De in- en uitgangsverbindingen
Входы для предусилителя и выходы на колонки
MULTICHANNEL ANALOG OUTPUTS
REAR R
SUBFRONT R CENTER REAR LFRONT L
RMB-1565 / RMB-1575
SURROUND RIGHT
FRONT RIGHT
SURROUND LEFT
CENTER
FRONT LEFT
Important Notes
When making connections be sure to:
✔ Turn off all the components in the system before hooking up any components, including loudspeakers.
✔ Turn off all components in the system before changing any of the connections to the system.
It is also recommended that you:
✔ Turn the volume control of the amplifi er all the way down before the amplifi er is turned on or off.
Wichtige Hinweise
Achten Sie beim Herstellen der Verbindungen auf Folgendes:
✔ Schalten Sie alle Komponenten im System ab, bevor Sie Geräte (einschließlich Lautsprecher) anschließen.
✔ Schalten Sie alle Komponenten im System ab, bevor Sie Anschlüsse im System verändern.
Ferner empfehlen wir, dass
✔ Sie die Lautstärke herunterdrehen, bevor Sie die Endstufe ein- oder abschalten.
Héél belangrijk:
✔ Zorg dat niet alleen de RMB-1565/1575, maar de gehele installatie uitstaat, als nog niet alle verbindingen gemaakt zijn.
✔ Zorg dat niet alleen de RMB-1565/1575, maar de gehele installatie ook uitstaat, als u verbindingen gaat wijzigen.
Wij raden u ook aan om
✔ de volumeregelaar van de voorversterker geheel dicht te draaien (volkomen naar links) wanneer u uw eindversterker aan- of uitzet.
5
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6
RMB-1565 / RMB-1575 Five Channel Power Amplifi ers
Contents
Important Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Figure 1: Controls and Connections 3
Figure 2: Preamp Input and Speaker Output Connections 4
Important Notes 5
About Rotel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
A Word About Watts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Operating Features 7
A Few Precautions 7
Placement 7
AC Power and Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
AC Power Input 7 7
Power Switch and Indicator 1 7
Turn On/Off Mode Selector 6 7
+12V Trigger Input and Output 5 8
Protection Indicator 2 8
Input Signal Connections 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Speakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Speaker Selection 8
Speaker Wire Selection 8
Polarity and Phasing 8
Speaker Connections 3 8
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Front Panel Power Indicator Is Not Lit 9
No Sound 9
Protection Indicator Is Lit 9
Specifi cations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
About Rotel
We all have concerns about our environment. And, as more and more
electronics are produced and later discarded, it is especially important
for a manufacturer to do all it can to engineer products that have a
minimum negative impact on landfi ll sites and water tables.
At Rotel, we are proud to do our part. We have reduced the lead
content in our electronics by using special ROHS solder, while our new
Class D (not digital) amplifi ers are up to fi ve times more effi cient than
our legacy designs and still deliver power and performance. These
products run cool, give minimum wasted energy, are good for the
environment and give better sound too.
Finally, we have printed this brochure on recycled paper stock.
While we understand that these are small fi rst steps, they are still
important ones. And we continue to pursue new methods and
materials for a cleaner and greener manufacturing process.
All of us at Rotel thank you for buying this product. We are sure it will
bring you many years of enjoyment.
A Word About Watts
This RMB-1565 power output is quoted as 100 watts for each
channel, when all fi ve channels are operating together at full power.
The RMB-1575 produces 250 watts per channel, also with all fi ve
channels operating at full power.
Rotel has chosen to specify the power output in this way because, in
Rotel’s experience, it gives the truest value of the receiver or amplifi er’s
power capability.
Our story began nearly 50 years ago. Over the decades, we have
received hundreds of awards for our products and satisfi ed hundreds
of thousands of people who take their entertainment seriously - like
you!
Rotel was founded by a family whose passionate interest in music
led them to manufacture high-fi delity components of uncompromising
quality. 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.
Rotel’s engineers work as a close team, listening to, and fi ne 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 fi nd capacitors
from the United Kingdom and Germany, semiconductors from Japan or
the United States, while toroidal power transformers are manufactured
in Rotel’s own factory.
When comparing specifi cations for different products, you should be
aware that power output is often specifi ed in other ways, so you may
not be comparing like with like.
For example, the power output may be quoted with only one channel
operating, giving a higher maximum fi gure. The highly regulated
power supplies of the Rotel Class D amplifi ers ensures that they will
produce the full specifi ed power output to one or all channels.
A loudspeaker’s impedance rating indicates the electrical resistance
or load it offers when connected to the amplifi er, usually 8 ohms or
4 ohms. The lower the impedance, the more power the speaker will
need. In effect, a 4 ohm speaker will require twice as much power as
an 8 ohm speaker.
So ideally, the amplifi er should be give double the power into a 4 ohm
load – a rating of 100 watts into an 8 ohm load should become 200
watts into 4 ohms. Using lower impedance speakers makes greater
demands on the amplifi er’s power supply, because it will be drawing
more current and giving off more heat.
English
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However, Rotel amplifi ers are designed to work into any speaker
impedance between 8 and 4 ohms, and with all the channels working
up to their full power. Because the Rotel design is optimized for use
with all channels operating together, Rotel is able to specify the true
power output for all channels.
This can be important for your enjoyment, too. When watching
movies, it’s nice to have the amplifi er able to reproduce full power into
all the channels at the same time, especially in the case of a volcano
exploding!
Getting Started
Thank you for purchasing the Rotel RMB-1565 or RMB-1575 FiveChannel Power Amplifi er. When used in a high-quality music or home
theater system, your Rotel amplifi er will provide years of musical
enjoyment.
The RMB-1565 and RMB-1575 are sophisticated fi ve-channel power
amplifi ers. Their Class D amplifi er circuitry, switching power supply,
premium components, and Rotel’s Balanced Design ensure superb
sound quality. High current ` allows the RMB-1565 and RMB-1575 to
drive diffi cult speaker loads with ease.
Operating Features
• Five amplifi er channels
• User selectable power on/off confi guration: manual, or controlled
by remote 12 volt trigger signal
• Protection circuitry with front panel indicator
AC Power and Control
AC Power Input 7
The amplifi er is supplied with the proper AC power cord. Use only this
cord or an exact equivalent. Do not use an extension cord. A heavy
duty multi-tap power outlet strip may be used, but only if it is rated to
handle the current demand of the amplifi er.
The RMB-1565 will automatically confi gure itself for the proper AC line
voltage rating, from 110 volts to 240 volts, at 50/60Hz. No setting is
required to match the unit to your local voltage.
The RMB-1575 is confi gured at the factory for the proper AC line
voltage in the country where you purchased it (USA: 120 volts/60 Hz,
Europe: 230 volts/50 Hz). The AC line confi guration is noted on a
label on the back panel.
Note: Should you move your RMB-1575 to another country,
it is possible to configure your amplifier for use on a different
line voltage. Do not attempt to perform this conversion yourself.
Opening the enclosure of the RMB-1575 exposes you to
dangerous voltages. Consult a qualified technician or the Rotel
factory service department for information.
Plug the supplied cord into the AC INPUT receptacle 7 on the back
panel of the unit. After all connections have been made, plug the other
end into an appropriate AC wall outlet.
Note: If you are going to be away from home for an extended
period of time, it is a sensible precaution to unplug your amplifier.
A Few Precautions
Please read this manual carefully. In addition to installation and
operating instructions, it provides information on various system
confi gurations. 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.
Save the amplifi er shipping carton and packing material for future use.
Shipping or moving the amplifi er in anything other than the original
packing material may result in severe damage to your amplifi er.
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.
Placement
The RMB-1565 and RMB-1575 generate heat as part of their normal
operation. The heat sinks and ventilation openings in the amplifi er are
designed to dissipate this heat. The ventilation slots in the top cover
must be unobstructed. There should be 10 cm (4 inches) of clearance
around the chassis, and reasonable airfl ow through the installation
location, to prevent the amplifi er from overheating. Likewise,
remember the weight of the amplifi er when you select an installation
location. Make sure that the shelf or cabinet can support its weight.
Power Switch and Indicator 1
The Power Switch is located on the front panel. To turn the amplifi er on
(or to activate either of the optional automatic power-on modes), push
the switch in. The ring around the switch will light, indicating that the
amplifi er is turned on. To turn the amplifi er off, push the button again
and return it to the out position.
Turn On/Off Mode Selector 6
The amplifi er can be turned on and off manually, or automatically by
using its “12V Trigger” system. The Turn On/Turn Off Mode selector
switch selects which method is used.
• With the switch in the OFF position, the amplifi er is turned on or off
manually using the front panel power switch. Use this mode if you
are using a switched AC outlet to control power to the amplifi er.
• With the switch in the 12V TRIG position, the amplifi er is turned
on automatically when a 12 volt trigger signal is applied to
the 3.5mm jack labeled IN. 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 amplifi er, regardless of
whether or not a trigger signal is present.
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5
RMB-1565 / RMB-1575 Five Channel Power Amplifi ers
+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 amplifi er on and off. To use this
feature the adjacent switch must be placed to the 12V TRIG position
(see previous section). 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.
Protection Indicator 2
Thermal and protection circuits protect the amplifi er against potential
damage in the event of extreme or faulty operating conditions. Unlike
many designs, the protection circuit in the RMB-1565 and RMB-1575
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 amplifi er if safe limits are
exceeded.
In addition, the amplifi er includes over-current protection which
operates only when load impedances drop too low. This protection is
independent for each of the fi ve channels .
Should a faulty condition arise, the amplifi er channel at fault will stop
playing and the PROTECTION LED on the front panel will light.
If this happens, turn the amplifi er off, let it cool down for several
minutes, and attempt to identify and correct the problem. When you
turn the amplifi er back on, the protection circuit will automatically reset
and the PROTECTION 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.
Speakers
The RMB-1565 and RMB-1575 have fi ve sets of speaker connectors,
one for each amplifi er channel.
Speaker Selection
The nominal impedance of the loudspeaker(s) connected to each
channel of the amplifi er in the various operating modes should be no
lower than 4 ohms.
Speaker Wire Selection
Use insulated two-conductor stranded wire to connect the amplifi er 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.
Polarity and Phasing
The polarity – the positive/negative orientation of the connections
– for every speaker and amplifi er 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 amplifi er connection.
Speaker Connections 3
See Figure 2
Note: The following text describes both binding post and
plug-in connections. DO NOT use both connection methods in
combination to connect multiple speakers.
Input Signal Connections 4
See Figure 2
The RMB-1565 and RMB-1575 have standard unbalanced RCA-type
input connectors, the type used on nearly all audio equipment. There is
an RCA input for each of the fi ve amplifi er channels. These RCA inputs
accept audio signals from preamplifi ers or surround sound processors.
Use high quality audio interconnect cables for best performance.
The RMB-1565 and RMB-1575 have two color coded terminals for
each amplifi er channel. These speaker connectors accept bare wire,
connector lugs, or “banana” type connectors (except in the European
Community countries where their use is not permitted).
Route the wires from the amplifi er to the speakers. Give yourself
enough slack so you can move the components to allow access to the
speaker connectors.
If you are using banana plugs, connect them to the wires and then
plug into the backs of the speaker connectors. The collars of the
speaker connectors should be screwed in all the way (clockwise).
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