Music sounds natural when player kept powered on

i have a ps audio perfect wave dac and transport and can report hearing no diffference between leaving the dac and transport on --i did this for one week and turning on each component prior to listening.

i have also not noticed the phenomenon of warm-up using tube preamps, tube amps and tube-based cd playerss.

i have noticed the affect of break -in of components but it doesn't seem to matter to me who long a component has been left on, as far as its sound is concerned.

perhaps this is another example of the placebo effect.

oh well, we all have our opinions on this and many subjects are almost impossible to confirm, i.e., demonstrate their existence.

i suppose, if one owned two of the same component and left one on while turning the other on and off an experiment could be designed.

note some people have more acute hearing and while others make be erroneous with respect to their perceptions.

Mrtennis,
Just to make it clear - it is my experience that I am describing. I don't have to do any experiments or prove anything to any one.
Yes, I understand that I might have acute hearing while you maybe making an erroneous perception. But nobody is perfect, so it is fine with me. I have my opinion and you have your opinion.

There have been some CD players in the past that powered the laser whenever the unit was switched on. You should contact the manufacturer to know more about your specific CD player.

I own an old Kinergetics KCD-40 that does not sound right until it is powered up for 3 days. By the 3rd day the soundstage opens up and the over all sound becomes smooth and relaxed with excellent timbre.

I also own an Audio Research CD player that does not sound that different after being left on.