When i first got my nad c320bee amp about 5 yrs ago i remember it taking about 30 mins to start sounding good. Gradually its taking longer and longer to do so now. Im at the point where its a huge noticeable difference after 90-120mins of playing when the music sounds much better. Volume gets louder, bass is fuller and more defined and much better clarity in general. ive tried to keep an open mind over the last few months about this and tried to make sure its not something im imagining but its definitely there. Its almost like a switch is turned on and the music goes from quite cold and hollow to what i mention.
Should it really take almost 2 hours for an amp to start sounding good or is it a sign of an imminent faliure?