Amp burn in time..just being on or music played?

You accelerate the benefit by playing music, even at a very low level. My Rowland integrated amp stays on 24/7 at Rowland's recommendation, but I played music through it constantly for the first 150 hours or so.

Most amps get up to a pretty nice preformance level in just 150 and improve very slowly from there; however, so cool running Class D amps like more like several hundred to 1000 hours.

Dave

You ask a perfectly logical question, but actually burn in time is not a function of either variable.

No, the correct burn in time is the minimum amount of time it takes to exceed your ability to return a component to the dealer if you decide you don't like the way it sounds.

How long is that time CWlondon...is it measured in minutes or hours, days or years in your experience ????