warm up/break-in period Your new Classé power amplifier will deliver outstanding performance
please read this manual... Please take a few minutes to review this manual, and to familiarize yourself with
8
The CA-M400 includes protection circuitry that will prevent the amplifier from
operating at dangerously high or low voltages.
• At startup: the AC mains voltage must be within a range of
approximately -15% to +10% of its nominal value at startup, or
the amplifier will not turn on. For example, a 120V unit requires
the AC mains to be between approximately 95V–135V in order to
turn on.
• Over-voltage during operation: if the AC mains voltage surges
by roughly 10% or more during operation, the amplifier will enter
protection mode and shut down. The Standby LED will flash to
indicate the protection mode has been engaged.
• Under-voltage during operation: if the AC mains voltage sags by
15% or more, the amplifier will continue to play (since this does
not present a particular danger to the amplifier), but note that
it may not be able to achieve its usual standard of performance
under these compromised conditions. The Standby LED will
flash to indicate the condition.
immediately. However, you should expect to hear it improve somewhat as
it reaches its normal operating temperatures and its various components
"break-in." It has been our experience that the greatest changes occur within the
first 300 hours, as the amplifier reaches thermal equilibrium and the capacitors
fully form. After this initial break-in period, the performance of your new
product should remain quite consistent for years to come.
The only exception to this rule is if the unit is placed in standby or unplugged
for an extended period of time, allowing it to cool down. Depending on the
degree of cooling involved, you should expect a brief warm-up period before the
power amplifier's sound quality is at its best. Unless your amplifier was allowed
to become quite chilled, subsequent thermal re-stabilization should not take
long. Fortunately, you should never have to repeat the initial 300 hour break-in
period.
your new amplifier. We understand that you are anxious to plug everything in
and get started. However, reading this manual and following the advice it gives
will ensure that you get all the benefits you deserve from having purchased such
a fine piece of equipment.