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7
English
These amplifiers are straightforward in their installation and operation. If
you have experience with other stereo power amplifiers, you shouldn’t find
anything perplexing. Simply plug in the associated components and enjoy.
A Few Precautions
WARNING: To avoid potential damage to your system, turn off ALL
the components in the system when connecting or disconnecting the
loudspeakers or any associated components. Do not turn the system
components back on until you are sure all the connections are correct
and secure. Pay particular attention to the speaker wires. There must
be no loose strands that could contact the other speaker wires, or the
chassis of the amplifier.
Please read this manual carefully. In addition to basic installation and
operating instructions, it provides valuable information on various RKB
amplifier system configurations as well as general information that will
help you get optimum performance from your system. Please contact your
authorized Rotel dealer for answers to any questions you might have. In
addition, all of us at Rotel welcome your questions and comments.
Save the RKB amplifier shipping carton and all enclosed packing material
for future use. Shipping or moving the amplifiers in anything other than the
original packing material may result in severe damage to your amplifier.
If included in the box please fill out and send in the owner’s registration
card. Also be sure to keep the original sales receipt. It is your best record
of the date of purchase, which you will need in the event warranty service
is ever required.
Placement
The RKB amplifiers generate heat as part of their normal operation. The heat
sinks and ventilation openings in the amplifier are designed to dissipate this
heat. The ventilation slots in the top and bottom covers must be open. When
possible there should be 10 cm (4 inches) of clearance around the back
side of the chassis. Reasonable airflow in the equipment rack is required
to prevent the amplifier from overheating.
Remember the weight of the amplifier when you select an installation
location. If you are not using the included rack ears make sure that the shelf
or cabinet used can support the RKB. We recommend installing the unit in
furniture designed to house audio components. Such furniture is designed
to reduce or suppress vibration which can adversely affect sound quality.
Ask your authorized Rotel dealer for advice about component furniture and
proper installation of audio components.
AC Power and Control
AC Power Input
8
Your amplifier is configured at the factory for the proper AC voltage in the
country where you purchased it, either 120 volts or 230 volts. The AC line
configuration is noted on a label on the side panel.
NOTE: Should you move your unit to another country, it may be possible
to reconfigure it for use on a different line voltage. Do not attempt to
perform this conversion yourself. Opening the enclosure of the unit
exposes you to dangerous voltages. Consult a qualified service person
or the Rotel factory service department for information.
NOTE: Some products are intended for sale in more than one country
and as such are supplied with more than one AC cord. Please only use
the one appropriate for your country/region.
Because of its high power rating, the amplifier can draw considerable
current. Therefore, it should be plugged directly into a wall outlet. The
RKB amplifier must be plugged into a 3-pin polarized outlet. Do not use
an extension cord. A heavy duty multi-tap power outlet strip may be used
if it (and the wall outlet) is rated to handle the current demanded by the
amplifier and all the other components connected to it.
Be sure the POWER SWITCH 1 on the front panel of the amplifier is
turned off (in the “out” position). Then, connect the supplied power cord to
the Power Connector 8 on the rear of the unit and the AC power outlet.
If you are going to be away from home for an extended period of time
such as a month-long vacation, it is a sensible precaution to unplug your
amplifier (as well as other audio and video components) while you are away.
POWER Switch and Power Indicator
1
The power switch is located on the front panel of your amplifier. To turn
the amplifier on, push the switch in. The ring around the switch will light
up and blink three times, indicating that the amplifier is turned on. To turn
the amplifier off, push the button again and return it to the “out” position.
NOTE: Place the self adhesive ring over the light surrounding the power
switch if the blue light is too bright.
Trigger Mode Selector
7
The RKB amplifiers provide three different options for manual or automatic
power operation. These modes are selectable using a three-position switch
on the back panel as follows:
• With the switch in the OFF position, the amplifier is turned on or off
manually using the front panel power switch. Also use this mode if
you are using a switched AC outlet to control power to the amplifier.
• With the switch in the SIGNAL SENSE position, the amplifier turns on
automatically when an audio signal is detected at the inputs. The
amplifier will go into Signal Sense Standby mode and the front Power
Indicator will dim after approximately 10 minutes without detecting an
audio signal. The front panel POWER SWITCH overrides this function.
It must be ON for the signal sensing function to operate. Turning the
front panel power switch OFF turns the amplifier off, regardless of
whether or not a signal is present.
• With the switch in the ON position, the amplifier is turned on automatically
when a 12 volt trigger signal is present at the 3.5 mm jack of TRIGGER
IN on the rear panel. The amplifier will go into standby mode and
the front Power Indicator will dim if the +12 volt signal is not present.
The front panel POWER SWITCH overrides this function. It must be
ON for the +12V trigger to work. Turning the switch OFF turns the
amplifier off, regardless of whether or not a trigger signal is present.
12V Trigger Input and Output
8
The jack labeled IN is for connecting the 3.5mm mono plug/cable carrying
a +12 volt trigger signal to turn the amplifier on and off. To use this feature
the toggle switch must be set to the ON position. This input accepts any
control signal (AC or DC) ranging from 3 volts to 30 volts.
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