Contents
Figure 1: Controls and Connections
Figure 2: Analog Inputs and Speaker Output Connections
Figure 3: Balanced (XLR) Inputs
About Rotel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
A Word About Watts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
AC Power and Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
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AC Power Input
1
Power Switch and Power Indicator
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Trigger ON/OFF Mode Selector
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12 Volt Trigger Input and Output
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Protection Circuitry
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Input Signal Connections
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
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Input Selector Switch
Speaker Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Speaker Selection
Speaker Wire Selection
Polarity and Phasing
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Speaker Connections
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Power Indicator Is Not Illuminated
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Fuse Replacement
No Sound
Protection Indicator is Illuminated
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
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.
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,
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give minimum wasted energy, are good for the environment and give better
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sound too.
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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
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and greener manufacturing process.
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All of us at Rotel thank you for buying this product. We are sure it will bring
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you many years of enjoyment.
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A Word About Watts
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The RB-1552MKII power output is quoted as 130 watts for each channel,
and the RB-1582MKII power output is quoted as 200 watts for each channel,
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when both channels are operating together at full power.
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Rotel has chosen to specify the power output in this way because, in Rotel's
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experience, it gives the truest value of the receiver or amplifier's power
capability.
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When comparing specifications for different products, you should be
aware that power output is often specified in other ways, so you may not
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be comparing like with like.
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For example, the power output may be quoted with only one channel
operating, giving a higher maximum figure. The high performance power
supplies of the Rotel amplifiers ensure that they will produce the full specified
power output to one or both channels.
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 RB-1552MKII or RB-1582MKII Stereo
Power Amplifier. When used in a high-quality music or home theater system,
your Rotel product will provide years of musical enjoyment.
The RB-1552MKII and RB-1582MKII 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
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