Amplifier Operation - Krell Industries Evolution One Owner's Reference Manual

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SECTION

Amplifier Operation

Evolution One amplifiers are easy to operate. However, it is important to exer-
cise care during operation due to the enormous power output of each amplifier.
Switching between active sources (such as a CD player or a recording device)
without muting the preamplifier output, or bumping or miscuing a source can
generate large transients at low frequencies. Evolution One amplifiers may gen-
erate enough power with these transients to damage loudspeakers.
IMPORTANT
Always mute or fully attenuate the preamplifier level when switching sources.
Do not change input connections to the amplifier when the amplifier is on.
Use care when setting high playback levels. Because of their tremendous
reserves of clean power, Evolution One amplifiers can safely drive speakers to
higher sound pressure levels than other amplifiers. Always lower the volume
level at the first sign of loudspeaker distress.
Powering On, Powering Down, and Powering Off
When powering on any system, turn on amplifiers last. When powering down, turn
off amplifiers first. Krell recommends leaving the Evolution One amplifier pow-
ered down (in the stand-by mode) between listening sessions. Turn the amplifier
off using the power breaker switch (21) on the back panel of the power supply
chassis (2), when the system is not being used for an extended period of time.
The procedure for amplifier operation follows:
1.
Insert the AC power cord plug into the dedicated wall outlet.
2.
Move the power breaker switch to the up position, to place the amplifier in
stand-by mode. The power/stand-by LEDs (4) on the amplifier and power sup-
ply chassis illuminate in red.
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