How long does it take your tube amp to warm up?

It takes longer for SS amps to reach optimum performance, especially Class A designs. Most tube amps will sound as good as they ever will after an hour.  SS amps benefit from never being turned off.

It takes 3.5 minutes…. The time it takes for the soft startup to complete and the amp to switch on. 
 

I used to experience a long warmup for my Audio Research REF 5SE preamp… it took about 12 minutes with signal running through it, and the improvement was substantial. But with the REF 6, that has gone away… sounds great as soon as the 1.5 minutes of soft startup is over and the mute comes off.

I have a pair of Cary 211FE amps which take an hour to an hour and a half to reach  what I call the Golden Zone. If right from the start I push them hard an hour but if I have company I like to slowly build up the volume so it will be about an hour and a half.

30 minutes for my heavily modified MC240….. vintage 1961

what might be a better ? to ask is do those big exotic caps and or cables ever form with the relatively tiny signal… ? see DBS patent… and ponder that the application of it might not be limited to just cables…..