Table Of Contents; About Rotel; A Word About Watts - Rotel RB-1562 Owner's Manual

6
Contents
Important Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Figure 1: Controls and Connections
Figure 2: Input and Output Connections
Important Notes
About Rotel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
A Word About Watts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Operating Features
A Few Precautions
Placement
AC Power and Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
7
AC Power Input
1
Power Switch and Indicator
2
Protection Mode LED
3
Turn On/Off Mode Selector
4
+12V Trigger Input and Output
2
Protection Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6
Input Signal Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Speaker Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Speaker Selection
Speaker Wire Selection
Polarity and Phasing
5
Speaker Wire Connections
Troubleshooting
Front Panel Power Indicator Is Not Lit
No Sound
Protection Indicator Is Lit
Specifi cations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

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.
RB-1562 / RB-1572 Stereo Power Amplifi ers
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
3 our legacy designs and still deliver power and performance. These
4
products run cool, give minimum wasted energy, are good for the
5 environment and give better sound too.
Finally, we have printed this brochure on recycled paper stock.
7 While we understand that these are small fi rst steps, they are still
7 important ones. And we continue to pursue new methods and
7 materials for a cleaner and greener manufacturing process.
7 All of us at Rotel thank you for buying this product. We are sure it will
7 bring you many years of enjoyment.
7
8

A Word About Watts

8
The power output of the RB-1562 and RB-1572 are quoted as
and 250 watts, respectively, for each channel, when both channels
8 are operating together at full power.
8
8 Rotel has chosen to specify the power output in this way because, in
8 Rotel's experience, it gives the truest value of the receiver or amplifi er's
9 power capability.
9
9 When comparing specifi cations for different products, you should be
9 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. If Rotel chose to quote
the RB-1562 or RB-1572 power output this way
would be 25-30% higher
impedance.
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 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.
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 both 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!
the specifi ed wattage
for the same distortion limit and loudspeaker
watts into an 8 ohm load should become
100
200