The most potential damage to your tubes is turning on your amp. The likelihood of a tube exploding and torching your house are tiny. Some amps will pop a fuse if a tube flares and some don’t. Bias type is most of the question there. I’d be more concerned with being electrocuted frankly. I would turn off after an hour or two of idle. But only once a day. No we regarding tube pre’s leave te=hem on in standby mode except when on vacation. They draw minimal power,the tubes last eons and they stay heated. But remember to pout in standby. Caps, etc go bad first from sitting and second from wear. If you are worried about tube replacement then you should, well...hey it’s part of maintenance. And I’ve been guilty of going out of town leaving a pair of monoblocks on—had to call a friend to go and turn them ooff for me. Fortunately he could get in through my garage with the code. Enjoy!
When do you turn off the tubes?
Having had recent surgery and spending a lot of time at home, I was wondering how long a break from music do you feel you need to be taking before turning off your tube amplifier.I could leave it on all day even when not listening but that would be 12+hours/day.While my PrimaLuna Dialogue HP is gentle on tubes, the thought of retubing 8 KT150s is an expensive prospect.I usually turn the amplifier off if I am not going to listen for around 3 hours.What do other people do?