Krell Evolution e Series Manual - Manual (Page 29)

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Evolution e Series Amplifier Operation
The Evolution e Series amplifiers are easy to operate.
IMPORTANT
When powering up any system, turn the amplifier on last. When powering down, turn it off first.
This will prevent any turn-on and turn-off thumps in your loudspeakers.
Always mute or fully attenuate the preamplifier level when switching sources. Do not change
input connections to the amplifier when the amplifier is on.
Krell amplifiers have large reserves of clean power that can safely drive loudspeakers to higher
sound pressure levels than other amplifiers. Use care when setting high playback levels, and
lower the volume level at the first sign of loudspeaker distress.
On/Off and Stand-by Operation
1. Move the back panel power breaker switch (10) to the up position to place the amplifier
in stand-by mode. The power status indicator (2) illuminates in green. Green is the
default standby color and indicates an ultra low power draw of 2 watts. On the
Evolution 302e, 402e, 403e, 400e, 600e, and 900e amplifiers an optional red standby
mode is available which keeps the input and driver stages continuously powered. To
engage the red standby power mode, move the power breaker switch (10) to the down
position, and while pressing the power button (1) on the amplifier front panel, return
power breaker switch (10) to the up position. Repeat the procedure to return to the
green operating mode.
2. Press the power button (1) on the amplifier front panel. The power status indicator (2)
illuminates in blue.
The initial power-up phase lasts approximately 30 seconds from the moment the back
panel power breaker switch is placed in the up position. If the power button is pressed
during this period, the power status indicator flashes blue for the remainder of the initial
power-up phase. When the initial power-up phase is complete, the power indicator
illuminates in blue and is no longer flashing. The amplifier is in the operational mode.
3. With the preamplifier muted or its volume completely lowered, select a source.
4. Increase the volume control to the desired listening level.
5. To return the amplifier to stand-by, press the power button on the front panel. The
power status indicator turns green or red, and the amplifier is in the stand-by mode.
It is now safe to place the rest of the system in stand-by.
Powering Off
Krell recommends leaving Evolution e Series amplifiers in the stand-by mode between
listening sessions. Turn the amplifier off using the power breaker switch (10), and
disconnect the amplifier from AC power when the system is not being used for an extended
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