It seems to me that many tube equipment manufacturers recommend that equipment not be left on while "unattended", due to the (small) risk of fire hazard should a tube fail. Not sure how well I would sleep at night knowing my tube mono blocks could kills me in a house fire. 🤣
Turn off or leave on?
I am curious to know what others are doing with respect to powering on/off their hifi systems. My system like most is a mix of tube and SS components: tube gear (mono amps, preamp, and phono). SS gear consists of (SACD/CD player, DAC, server, and external clock) and I have a conventional DC powered motor for my LP player. On days when I know I will listen to music, I turn it all on and leave it on until I go to bed at which time I turn it all off. I have read that it is better to leave SS components on (limit the number of temperature swings associated with powering up) and only power down tube gear (extend tube life). Many of the components have power saving features so they shutdown after an inactive period but that is more of a sleep mode as I understand it and not the same as a true power down. Not to complicate the question further, all the amps are hybrid so they have in effect both tubes and transistors My SS gear is a dCS Vivaldi One plus external Vivaldi clock, server is Taiko Extreme, and my amps are all from Tenor Audio. LP player is AMG 12 that uses a typical external DC motor always left on and powered up.
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According to the rebuilder of my solid state (integrated) amp, it should be left on all the time for longest life of the electronics. On their newer models they moved the on/off switch to the back.My phono stage (also SS) doesn't even have a power switch. If in doubt, talk to the manufacturer or authorized repair shop. It sounds better when played for a little while, but I'd hate to have to wait for it to warm up - often times I'll just play a record or two. |
@kgbspy, (putin, is that you ???)
Ok you can climb down from your pedestal now and go ... well go somewhere. If the component is solid state and does not consume huge amounts of power when in its quiescent state then better to leave it permanently on, unless it's not going to be used for a considerable period. Those who remember the old incandescent light bulb will know that 99% of the time they blew at switch on. The filament is cold, its resistance at its lowest and is when it draws the most current. POP. Same with the solid state component. When on it warms up and then cools again when powering down, there is expansion and contraction on the PCBs and also condensation. You have now unwittingly provided all the ingredients for failure. Left on the device stays gently warm and should last decades. For tubes that are permanently on their life will be shortened but there is a work-around. Some amps that have a standby switch just turn off the HT but leave the heaters/filaments on which will, over time, lead to cathode poisoning, however if the cathode voltage is reduced to 2/3 voltage, that is 4.2V instead of a 6.3V supply, all is fine and stripping is no longer a problem. This feature is not often found but I use it on my DIY stuff. When coming out of standby I arrange for the heaters to come immediately to design V and use soft start for the HT. There is little or no warm up needed as the amp is always and safely warm. 😎
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