Do speakers take time to warm up?

@douglas_schroeder , do you believe that the speakers mechanical parts need to be warmed up at all, like a cars engine when you start it in the morning?  Like the surround and voice coils Need to loosen up a bit?  
What about caps in the speaker?  
Caps in the amp?  If I leave my amp on 24/7 it’s warm and teady to go whenever, right?

Thanks for the response! 

I leave my solid state amp on all the time so its warm and have always thought that its a good idea to let speakers warm up a bit, say 15 minutes before really laying into them but this was new to me.

Now come to think of it, these speakers Fritz has recently sent me, similar experience.  I had mentioned to him both times “these are starting to break in and open up” and his response Was that the drivers already had time on them, not sure about the crossovers but they probably had time on them as well.

Anyhow, very interesting.  
@schubert , I have never heard about cables adjusting to a speaker... thats an interesting and new thought as well.  Care to expand?  I have Analysis Plus Oval 8’s; absolutely love them.  May be my prized possession of my stereo 😁

I should have been clearer perhaps.

I just got some used Kef R100’s.  They were in transit for a week.  I’m not sure if they were in use before the seller shipped them or how long they’d been sitting around not in use.

I disconnected the speakers I ws using, gently put my speaker cables on the ground without twisting them all up.

Connected the Kefs and there was very little bass and the soundstage sucked.  Listened to them for an hour and thought  I had made a mistake.  Left for an hour (speakers were playing during that time) came back and the soundstage is huge and there is some pretty good bass now.

And I don’t mean subtle changes, it was really really noticeable.  I’ve never experienced something quite like that and I have been through tons of speakers 🤔

I was wondering about that, Douglas, but I’ve never experienced it to that effect before.  Must have been a combination of that and what roberjerman said.

I’ve always noticed that my system and prior systems take 30 minutes or so to really start sounding good and thats why I’ll start playing music on my system and go do other things for 30 minutes before listening.

What happened with the kefs was totally different though.  I’ve never heard such a big change.

Maybe sometime in the next few days I’ll put the kefs back into rotation, take a video of them, let them play for an hour and then take another video with them playing the same song, at the same level and see if I can head a difference.

@douglas_schroeder , I agree that mental state plays a huge role.  Your mood, your sleep, your physical activities that day, all play a big role in sound.  I iusg have never thought about the listner adjusting to speakers; interesting theory.  You change speakers as much as I do only yours are much more expensive.  I value your opinion because you have quite a bit of experience regarding this...