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RKB-2100 Power Amplifier
: You can remove the feet from the bot-
NOTE
tom of the amplifier if necessary for clearance
in the rack. Save the feet and hardware for
future use.
After the adaptors are installed, use four bolts
supplied with your equipment rack to mount
the amplifier. Be sure that all four bolts are
tightened properly.
Rack Handles
The rack mount brackets are supplied with
handles which can be installed or removed.
The handles are installed with two of the
long Philips head machine screws inserted
through the rack mount bracket and into the
threaded holes in the handle. If you do re-
move the handles, use the rubber hole plugs
supplied with the bracket hardware to fill the
exposed holes.
Optional Fan Kit
The RKB-2100's generous heatsinks provide
adequate cooling for most installations. How-
ever, when rack mounting or otherwise install-
ing the amplifier in a confined space near
other heat-generating components, additional
cooling may be desirable. The optional RKBF-
1 fan kit can be easily installed for additional
forced air cooling. In addition to lowering
operating temperatures, the optional fan kit
improves the performance of the amplifier,
especially when driving difficult loudspeaker
loads. See your Rotel dealer for information
on the optional fan kit.
: The optional cooling kit generates me-
NOTE
chanical fan noise during operation. When
using the fan cooling, select a location for
the amplifier where the noise will not be
intrusive.
AC Power and Control
AC Power Input
Your RKB-2100 is configured at the factory
for the proper AC line voltage in the country
where you purchased it (USA: 120 volts/60
Hz, Europe: 230 volts/50 Hz). The AC line
configuration is noted on a label on the
back panel.
The RKB-2100 is supplied with the proper AC
power cord. Use only this cord or an exact
equivalent. Do not modify the supplied cord.
Do not use an extension cord.
Be sure the power switch on the front panel
of the RKB-2100 is turned off. Then, plug one
end of the cord into the AC power connector
on the back panel of the amplifier. Plug the
other end into an appropriate AC outlet.
If you are going to be away from home for
an extended period of time, it is a sensible
precaution to unplug your amplifier.
Power Switch
Indicator LED
The power switch is located on the left side
of the front panel. To turn the amplifier on (or
to activate either of the optional automatic
power-on modes), push the switch in. The
LED indicator above the switch will light,
indicating that the amplifier is turned on. To
turn the amplifier off, push the button again
and return it to the out position.
Auto Turn On/Off Mode
Selector
The RKB-2100 provides three different op-
tions for manual or automatic power on/off
operation. These modes are selectable us-
ing a three-position slide 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 ampli-
fier.
• With the switch in the SIGNAL
SENSE position, the amplifier turns on
automatically when a signal is detected
at the inputs. The amplifier will go into
standby mode several minutes after no
signal is no longer present. The front
8
panel power switch overrides this function.
It must be ON for the signal sensing to
work. Turning the switch OFF cuts power
to the amplifier, regardless of whether or
not a signal is present.
• With the switch in the 12V TRIG
position, the amplifier is turned on auto-
matically when a 12 volt trigger signal is
present at the 12V TRIG input to the left of
the switch. The amplifier goes into standby
mode if the +12 volt signal is not present.
The front panel POWER SWITCH over-
rides this function. It must be ON for the
+12V trigger to work. Turning the switch
OFF cuts power to the amplifier, regard-
less of whether or not a trigger signal is
present.
12V Trigger Input
An input jack for connecting the wires car-
rying a +12 volt trigger signal from a Rotel
preamp or surround sound processor to turn
the amplifier on and off. To use this feature
the adjacent slide switch must be placed to
the left position (see previous section).
The TRIGGER INPUT accepts any control signal
(AC or DC) ranging from 3 volts to 30 volts.
Using a cable with mono 3.5 mm mini-plugs
on both ends. The +12 V DC signal appears
at the "tip" connector.
12V Trigger Output
The 12V TRIG jack labeled OUT is used to
pass the remote turn-on signal to a second
Rotel amplifier. Any 12V Trigger signal at
the INPUT jack will be passed through to
the OUT jack.
Circuit Breaker
A 16 amp circuit breaker on the rear panel
protects the amplifier's electrical circuity.
Generally, the circuit breaker will only open
under a fault condition which results in exces-
sive current draw. To reset the circuit breaker,
press the button. Should it repeatedly open,
contact your authorized Rotel dealer for
troubleshooting assistance.
Protection Indicator
A thermal protection circuit protects the ampli-
fier against potential damage in the event of
extreme or faulty operating conditions. Unlike
many designs, the RKB-2100's protection cir-
cuit is independent of the audio signal and has
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