@rkosak congrats on the 761 a very fine amp! I bought mine brand new almost a year ago now, and it took about 200 hours to stop changing in my system. During this time it was up and down going from nasal and constricted bass to wide open and good sounding. Break in is definitely required on these amps. As long as it’s plugged in and the main power switch is on, but if in standby, it comes on song in a day or so; if you shut off the main power switch for a few days, however , it will take longer to get back to its best performance.

