Classe CA-2200 Manuel D'utilisation page 20

Caution!
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6. Double-check all your connections.
We understand that this step sounds redundant, but it is worth the extra
minute or two it might take just to ensure that all connections are correct
and secure before plugging the power cables to the AC outlets..
7. Turn on all the other components in your system, and then turn
on your amplifier.
It is always good practice to turn any power amplifier on last, and to turn
it off first. Doing so prevents any turn-on/turn-off transients that might
originate in other components from damaging your loudspeakers.
Care and Maintenance
To remove dust from the cabinet of your amplifier, use a feather duster or a lint-
free soft cloth. To remove dirt and fingerprints, we recommend isopropyl alcohol
and a soft cloth. Dampen the cloth with alcohol first and then lightly clean the
surface of the amplifier with the cloth. Do not use excessive amounts of alcohol
that might drip off the cloth and into the amplifier.
At no time should liquid cleaners be applied directly to
the amplifier, as direct application of liquids may result in
damage to electronic components within the unit.