Leave system on or power everything down?

Given some later responses I’ll share my experience with my McCormack amp I’ve owned for about 30 years.  Unless I was leaving for a week I left my amp on 24/7 and had no problems except one blown fuse over that time.  I recently had my amp upgraded at SMcAudio and they said I probably extended the life of my amp significantly by leaving it on — pretty sure Steve McCormack knows what he’s talking about.  I think they mentioned that the constant warming and cooling of electronic components is not desirable and can shorten their life over time and that it’s much better to leave them in a warm steady state.  They believe this so strongly that when they upgrade amps they basically disable the front power switch so that it’s just a dummy light to let others know the amp is on, and to turn the amp off you have to physically unplug it.  Thought my experience and the info from SMcAudio might be of interest, and hope this is helpful. 

@soix  Not to diminish or question your experience.  I'm sure Steve McCormack knows a lot.  But other manufacturers hold the exact opposite opinion and suggest turning equipment off when not in use.  Again, we are talking about on/off once per day and not repeated cycles every hour or two.  In the end, this question, like so many, falls into the "you are correct Sir" category.  That is to say, whatever opinion is given by an individual, the only appropriate response is "You are correct Sir"  😃

@bigtwin Not saying I’m right — just wanted to share the info so the OP can make his own decision.  That other manufacturers, who obviously know a helluva lot more than I do, advocate turning stuff off just shows there are likely pluses and minuses both ways.  The OP is looking for info so he can make a well-informed decision, and I think it’s great that he’s getting good info on both sides.  This is what this forum is all about IMHO.

@soix  You are correct Sir.  🤣

Cheers.

If your amp is linear, turn it off when not in use. If it’s Class D it may take 2-3 days to sound it’s best.

The docs say the standby power of that amp is tiny so stand by mode seems correct.

Your subs are going to also be extremely low power when unused.