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About Rotel
A family whose passionate interest in music
led them to manufacture high fidelity compo-
nents of uncompromising quality founded Rotel
over 40 years ago. Over the years that pas-
sion has remained undiminished and the 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, 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, semiconductors from Japan or the United
States, and toroidal power transformers manu-
factured 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 musi
cal, 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 RMB-1048
Eight-Channel Power Amplifier. When used
in a high-quality music or home theater sys-
tem, your Rotel amplifier will provide years
of musical enjoyment.
The RMB-1048 is a sophisticated eight-channel
power amplifier. Discrete output devices, a
massive power supply with toroidal trans-
former, premium components, and Rotel’s
Balanced Design ensure superb sound qual-
ity. High current capability allows the
RMB-1048 to drive difficult speaker loads with
ease.
Operating Features
• Four pair of amplifier channels.
• User selectable power on/off configura-
tion: manual or controlled by remote 12
volt trigger signal.
• Front panel input level controls.
•Protection circuitry with front panel indi-
cators.
• Signal link output to pass-through the in-
put signal to another component.
A Few Precautions
Please read this manual carefully. In addition
to installation and operating instructions, it
provides information on various RMB-1048
system configurations. Please contact your au-
thorized Rotel dealer for answers to any ques-
tions you might have. In addition, all of us at
Rotel welcome your questions and comments.
Save the RMB-1048 shipping carton and
packing material for future use. Shipping or
moving the RMB-1048 in anything other than
the original packing material may result in
severe damage to your amplifier.
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-1048 generates heat as part of its
normal operation. The heat sinks and venti-
lation openings in the amplifier 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 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 weight.
Contents
Important Safety Information ................ 2
Figure 1: Controls and Connections 3
Figure 2: Input and Output Connections 4
About Rotel .......................................... 5
Getting Started ..................................... 5
Operating Features 5
A Few Precautions 5
Placement 5
AC Power and Control ........................... 6
AC Power Input 6
Power Switch and Indicator 6
Turn On/Off Mode Selector 6
+12V Trigger Input and Output 6
Protection Indicators ........................ 6
Input Signal Connections .................. 7
Input Signal Link Switches 7
Signal Output Link Connectors 7
Input Level Controls ......................... 7
Speakers............................................... 7
Speaker Selection 7
Speaker Wire Selection 7
Polarity and Phasing 7
Speaker Connections 7
Troubleshooting..................................... 8
Front Panel Power Indicator Is Not Lit 8
No Sound 8
Protection Indicator Is Lit 8
Specifications ........................................ 8