How long daes it take your gear to warm up?

Currently i leave my electronics on 24/7/365.
When i did turn it off, with both the prior equipment, and my current stuff, it would take at least several hours for it to sound better.
Then if it was left on a full day, it sounded even better than if just for a few hours.
So, even though it costs money for electricity, I leave it all on all day long... As the sound is worth the added costs.

About 45 minutes ......

A couple hours for my all-tube system, though it's at least listenable after 45 minutes.

My stuff generally sounds good from teh start but warm up does not hurt. Its important to me to be able to sit down and enjoy without a wait. Even the ARC sp16 tube pre-amp, which has a relay that turns on once the device warms up after power on in a matter of seconds, is 100% listenable out of the gate. Also I leave my SS DAC and power efficient Class D power amps on most of the time. You can't do that generally with most tube gear without reducing tube life.

Maybe its just me and my tin ears, but I think my tube pre/amp sounds pretty stable after about 1/2 hour. No option of leaving it on 24/7 like I used to with my SS gear.