Warm up time for record playing

Take it easy Slaw, why so needy? I did acknowledge your post. Notice the “indeed” in my comment. Yours was the first and only post (until I post) to mention suspension. So, when I wrote my comment about the suspension as a possibility and write “indeed” as acknowledgment, who or what pray tell would I be referring to if not your post? So, to hopefully make up for my great transgression and to bank a few actual name mentions for possible future oversights 😊:

Slaw, Slaw, Slaw, Slaw, Slaw, Slaw, Slaw, Slaw, Slaw, Slaw, Slaw, Slaw, Slaw, Slaw

@frogman,

Thanks buddy. You must feel guilty about something.

@fsellet, you would be wise to discount everyone else's hearing. I am just trying to offer a reasonable and very factual reason for the OP's experience.  https://en.wikipedia.org/wiki/Stapedius_muscle#:~:text=The%20stapedius%20is%20the%20smallest,in%20th....if everyone wants to believe something else that is their prerogative. The only other reasons I can think of that would make sense are; a tube phono stage that needs to warm up, but that usually only takes 15 minutes. Vibration of the cartridge's suspension generating heat softening the damper. This would lower the cartridges resonance point and possibly its interaction with the tonearm. It would not likely produce any changes in the audio range. So, we are back to the little stapedius muscle. We can give rvpiano a case of bilateral Bell's palsy and see if the effect goes away. He can pose for an indian death mask at the same time:)

If it was just your hearing changing than digital sources would take just as long but they take 20 minutes compared to nearly an hour for the turntable. 

If you have a tube phono preamp, 30-45 minutes is ideal.