Warm-up time for amps and preamps

auxinput is correct.
All solid state devices consist of metals, metal oxides and binders to bond them together. Overtime the solvent in the binders begin to evaporate and contributes to the resistor, diode or what have you, deteriorating.

I have mostly tube equipment, so I like to play a recording at low level, to put all electromechanical, and electrical functions of all components in a working state for 10-15 minutes or so (sometimes less), before I sit down to serious focused listing. I feel there is advantage to allowing the processed signal from you cartridge (or other source) to complete transmission thru your speakers, where the signal is processed thru the tube grids opposed to the tubes in an idle state, speaker motors in a working state warming up and working the surround material, interconnects  transferring signals, etc.
 
 

I’m running a Class D Taranis by Merrill Audio. Got a bit concerned by rvpiano’s tech’s comment about "on with no input signal" being bad for Class D. Checked with Merrill W., the designer of the Taranis, since my usual practice is to power down all gear except the Taranis. The Taranis does not have a conventional on/off power switch. Merrill assured me the Taranis will not suffer from being powered up though receiving no signal. Worth noting he did NOT say this might not be an issue for other designs.

The OP topic has been covered previously, never the less things sound better to me after 30-60 minutes playing music even if gear is turned on to warm up prior to that.  Agree with those who speculate this might be a psycho-acoustic effect as much as hardware related.  

I turn my system on about an hour before listening. Three hours later it is swinging. But I do keep it on for full weekends at times. I have found in my case my solid state amp and ancilarys improve in sound up to the next day after turn on.
I know, that is what I was thinking to. 

My system takes at least 45 minutes to warm up and sound correct. Turn it on once if Im going to listen then I turn it off once.

In response to ghosthouse, the psycho-acoustic effect is enhanced even more with a glass of Scotch.