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Figure 1
Evolution 2250e
Stereo Amplifier
Front Panel
Figure 2
Evolution 3250e
Three Channel Amplifier
Front Panel
2
Krell Evolution 2250e
This product is manufactured in the United States of America. Krell
is restricted for use by Krell Industries, LLC, its subsidiaries, and authorized agents. All other trademarks and trade names
and 3250e Series Amplifiers
are registered to their respective companies.
© 2011 by Krell Industries, LLC, All rights reserved.
Front Panel
1 Power Button
Press the power button to
place the amplifier in
operational mode.
Operational mode. The
power status indicator is
illuminated in blue when the
amplifier is in operational
mode.
2 Power Status Indicator
Stand-by. The power status
indicator is illuminated in
green when the amplifier is in
the stand-by mode. Green is
the standby color and
indicates an ultra low power
draw of 2 watts.
®
is a registered trademark of Krell Industries, LLC, and
Back Panel
3 Loudspeaker Binding Posts
Stereo. One pair of
loudspeaker binding posts per
channel.
Three-channel. One pair of
loudspeaker binding posts per
channel.
4 Left and Right Single-ended
Inputs Stereo. One left
single-ended input and one
right single-ended via RCA
connectors.
Three-channel. One
single-ended input per
channel via RCA connectors.
5 Left and Right Balanced
Inputs Stereo. One left
balanced input and one right
balanced input via XLR
connectors.
Three-channel. One balanced
input per channel via XLR
connectors.
6 12 VDC Out/In (12 V trigger)
In. The 12 V trigger enables
you to turn the Evolution e
Series amplifier on or to stand-
by from other components.
Out. The output sends 12 VDC
(12 V trigger) power on/off
signals to other Krell
components and other devices
that incorporate a 12 V trigger.
7 IEC Power Connector
Used to connect the provided
20 amp AC power cord. This
connector and power cord
must remain unobstructed for
easy removal in case of an
emergency.
8 Back Panel Power
Breaker Switch
Place this switch in the up
position to put the amplifier in
stand-by mode.
9 Balanced / Single Ended
Input Select Switch
Set this switch for the stle of
connection being used,
balanced/XLR or single-
ended/RCA.
10 Speaker Fuses
The speaker fuse protects the
S-275 in case of overload or
malfunction.
Figure 3
Evolution 2250e
Stereo Amplifier
Back Panel
Figure 4
Evolution 3250e
Three Channel Amplifier
Back Panel
Krell Evolution 2250e and 3250e Series Amplifiers
3
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