If burn-in exists, I have no proof or indication. My psychological state seems to have more of an effect on how my system sounds than any burn-in. After the second beer my system sounds much better. If burn in exists, it is likely to be very subtle and gradual. With all due respect I am not convinced by any of those above who argue that there is a huge burn-in effect. Opening or closing a cabinet door neer my room reflection points, changing the position of the blinds, etc. has a much bigger effect on the sound than burn-in could possibly have. Do you have an anechoic chamber ? Then I may be convinced that you can detect burn-in.
