Classe Audio CA-M600 Owner's Manual page 17

Do not open your amplifier. There are no user-serviceable parts within
this product.
Danger! Potentially dangerous voltages and current capabilities
exist within your power amplifier, even when disconnected
from AC mains. Do not attempt to open any portion of the
amplifier's cabinet. There are no user-serviceable parts
inside your power amplifier. All service of this product
must be referred to a qualified Classé dealer or distributor.
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