How to evaluate amps that are not broken in?

PS - I bought a late model amp used from a broker recently and I am not sure it was completely broken in... cause the sound changed over time. Or was just me? HA!

I asked a dealer why he didn't run his demo speakers at night to break them in (he carried B&W speakers and they *really* needed hours on them). His response?

"The cleaning crew would not have it."

????

My experience with human nature is that those with a passionately held and generally negative position will press their case vociferously and indefinitely, even in the face of volumes of contradictory evidence, particularly if this evidence does not square directly with their own experience, perceptions, or sense of fairness. - Knownothing

Depends on what one considers and accepts as evidence. Loads of anecdotal evidence is nothing more than loads of anecdotal evidence.

Wow! Seems this thread has now entered the realm of philosophy! Naturally, the following question arises:
If a component goes through a break-in process but audiophiles are too busy debating whether break-in is "real" to pay attention... then what??????

If a component breaks in when no one is listening , does anyone know it ?

Hmmm .

;-)