Component lifetime is a estimate taking into account turning off and on , but the life time can be far greater when left in use. A good example of this is a light bulb that has been on for over 100 years ..calrmart
about leaving the amplifier on all the time!
15 years x 24 hours x 365 days=131400 hours
tipical lifetime of a computer grade electrolytic (in Components and Materials Handbook of phillips) is +- 10.000 hours...
food for thougt!!!
Seriously doubt it. That is why it has an AC fuse , rail fuses, and usually a speaker fuse. It is not like cheap Li-Ion battery chargers which do have a bad reputation for fires. Walk around your house and count how many things are always on. TV, microwave, furnace. Everything with a remote control. How many wall worts? Better yet. when you think everything is off, go look at your electric meter.Thats good too, but its dangerous that because your house can be set on fire because of malfunction in amp..