"Burn-In" quietly?

It is not worth the risk of burning up the amp to burn it in! I agree with Swampwalker & 1markr, some amps especially tube do not like being operated without a load. As much as it is an inconvenience to continously play music through gear for the purpose of break-in with speakers or resistors connected, it beats repair costs.

Stevecham, well put my friend! I don't think it's old school at all to suggest the journey should be savored. For example when I pack up the motorhome for a trip, getting there is most of the fun. Anyway my system is on most of the time, even when I'm not in the listening room for background music. You right, it shouldn't be turned into a chore.