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Back Panel, continued
5 Left and Right Single-
ended Inputs
Stereo. One left single-
ended input and one
r
ight single-ended via
RCA connectors.
Three-channel. One
single-ended input per
channel via RCA connec-
tors.
Monaural. One single-
ended input via an RCA
connector.
6 Left and Right
Balanced Inputs
Stereo. One left bal-
anced input and one
right balanced input via
XLR connectors.
Three-channel. One bal-
anced input per channel
via XLR connectors.
Monaural. One balanced
input via an XLR connec-
tor.
7 12 VDC Out/In
(12 V trigger)
The 12 V trigger enables
you to turn the Evolution
amplifier on or to stand-
by from other compo-
nents.
Out. The output sends 12
VDC (12 V trigger) power
on/off signals to other
Krell components and
other devices that incor-
porate a 12 V trigger.
8 Backlight
Ext In. Connect a 12 V
trigger to Ext In to tur
n of
f
the power status indica
-
tor using a remote con-
trol. On/Ext (see below)
must be active in order
for Ext In to function.
On/Ext. Activates the
power status indicator (2).
The factory default is
on/ext.
Of
f.
T
ur
ns of
f the power
status indicator.
9 IEC Power Connector
Used to connect the pro-
vided 20 amp AC power
cord.
10 Back Panel Power
Breaker Switch
Place this switch in the
up position to put the
amplifier in stand-by
mode.
Figure 4
E
volution 403
Multi-channel
Amplifier
B
ack Panel
Figure 5
Evolution 400
Monaural
Amplifier
Back Panel
Figure 6
Evolution
Monaural 600
or 900 Amplifier
Back Panel
(Evolution 600
shown)
Krell Evolution Amplifiers
3