Warm Up/Break-In Period - Classe Audio CA-M400 Owner's Manual

warm up/break-in period

Your new Classé power amplifier will deliver outstanding performance
immediately. However, you should expect to hear it improve somewhat
as it reaches its normal operating temperatures and its various compo-
nents "break-in." It has been our experience that the greatest changes
occur within the first 300 hours, as the amplifier reaches thermal equi-
librium 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 un-
plugged for an extended period of time, allowing it to cool down. De-
pending 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.
9