Rotel RMB1575BK, RMB-1565 manual Contents, About Rotel, A Word About Watts

6 RMB-1565 / RMB-1575 Five Channel Power Amplifiers

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

Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

About Rotel

Our story began nearly 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, 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

This RMB-1565 power output is quoted as 100 watts for each channel, when all five channels are operating together at full power. The RMB-1575 produces 250 watts per channel, also with all five 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 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. The highly regulated power supplies of the Rotel Class D amplifiers ensures that they will produce the full specified power output to one or all 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.

So ideally, the amplifier 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 amplifier’s power supply, because it will be drawing more current and giving off more heat.