Always on ?

I just spoke to nelson Pass about his ss amps,he says you can leave them on all the time, but he powers down his amps to standby when not in use.

my Accuphase pre takes ~30 hours warmup to sound its' best. The amp seems less sensitive to sonic changes as it warms up, however I leave both pieces powered on full time (as for all solid state). Tubes I do not leave on full time, unless a standby setting is available on the component.
Realize that depending on your geographic location, you are more vulnerable to component lightning damage during a thunderstorm when equipment is powered on; however you do remain vulnerable even when powered off as long as the line cords are plugged in. So use a line conditioner with integral surge protection; alternatively install a whole-house surge protector wired parallel at the distribution panel, along with downstream parallel transient snubbers wired across your AC outlets, or built into them. Still: when storms are in your area the best protection is to power down and unplug everything.

Thank you Bob_bundus for your informations !
Yes, I have a line conditioner with surge protection. But I will turn off and unplug everything in case of thunderstorm or away from home for few days.

Is there any possibility that an amplifier or preamplifier coult burn into flames when on, like it happens more often than some think with tv sets ?

RobertD
Thanks for the professional input. I have begun doing as you suggested.
John

If you are worried about lightening, then be sure to unplug everything. If your house is hit by lightening, it is unlikely any surge protector will survive to protect your gear. There is simply too much energy in lightening.