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Rotel RMB-1575 Manual

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RMB-1565 / RMB-1575 Five Channel Power Amplifi ers
About Rotel
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.
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.
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.
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
… 6 …


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