ROTEL RMB-1555 - Manual (Page 8)

8
RMB-1555/RMB-1585 Five Channel Power Amplifiers
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) amplifiers are up to five times more efficient 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 first 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
The RMB-1555 power output is quoted as 120 watts for each channel, and
the RMB-1585 power output is quoted as 200 watts for each channel, when
five channels are operating together 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 amplifier’s power
capability.
When comparing specifications for different products, you should be
aware that power output is often specified 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 figure.
A loudspeaker’s impedance rating indicates the electrical resistance or
load it offers when connected to the amplifier, 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.
However, Rotel amplifiers 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 both
channels.
This can be important for your enjoyment, too. When watching movies, it’s
nice to have the amplifier 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-1555 or RMB-1585 Stereo Power
Amplifier. When used in a high-quality music or home theater system, your
Rotel product will provide years of musical enjoyment.
The RMB-1555 and RMB-1585 are high-power amplifiers, 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 allow the RMB-1555 and RMB-1585
to drive the most demanding loudspeakers.
Contents
Important Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Figure 1-1: RMB-1555 Controls and Connections 3
Figure 1-2: RMB-1585 Controls and Connections 4
Figure 2: Analog Inputs and Speaker Output Connections 5
Figure 3: Balanced (XLR) Inputs 6
Important Notes 7
About Rotel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
A Word About Watts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
A Few Precautions 9
Placement 9
AC Power and Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
AC Power Input 7 9
Power Switch and Power Indicator 1 9
Trigger ON/OFF Mode Selector 5 9
12 Volt Trigger Input and Output 5 9
Protection Circuitry 1 9
Input Signal Connection 234 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Speaker Conncection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Speaker Selection 10
Speaker Wire Selection 10
Polarity and Phasing 10
Speaker Connection 6 10
Cooling Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Power Indicator Is Not Illuminated- 11
Fuse Replacement 11
No Sound 11
Preoctection Indicator 11
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
About Rotel
Our story began over 50 years ago. Over the decades, we have received
hundreds of awards for our products and satisfied 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-fidelity 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 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, 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 landfill sites and water tables.