Classe Audio CA-M400

ENGLISH

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.

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 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.

please read this manual… Please take a few minutes to review this manual, and to familiarize yourself with

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.