Do speakers have to "warm-up" too?

i warm up my amplifiers for 30 minutes before listening (everything else is on "standby" all the time), but i strongly feel that
the (first) cd i have on sounds (much) better (fuller, more open sounding) towards the end than it did at the start. i get this impression time after time. my speakers are broken in of course, but (perhaps) they become more compliant, or the voice coils warm up (?) i'm not an engineer, but it makes sense that speakers reach a sort of "equilibrium" after playing music for a given period of time. otoh, of course, my ears could be "adjusting" to the sound, and/or the effect could be largely psychological. does anyone else have this experience or feel the same way i do?
I think what you are hearing isn't speakers warming up; rather it is your amplifier warming up.
You're not crazy, I've noticed this too. I believe you're right, the voice coils do need to warm up, or at least something like that (the designer of my speakers told me something to that effect).
Yea things move better. Also don't forget Audioquest theory that the cables also have to worm up, hence there batt pack to keep them "worm"
Good question. I've never seen or heard of a speaker manufacturer talk about "warm up time." It makes sense to me, but I tend to agree with Beavis that the amps, and possibly the pre (provided your using a pre)(and even with standby mode), are still warming up.
Especially if your running large monoblocks.
Of course, I only listen to music whilst sipping my favorite beverage.
And the more I sip, the better it sounds (usually). ;-)
Beavis, perhaps, but remember, in the post french_fries says he lets his amps run for 30 minutes before putting any signal through them. Now Perfectionist has the right idea when it comes to listening enjoyment!
I doubt that there is much warmup for speakers. Conceivably, the suspension parts (surround, the spider, etc.) could be warmed by friction, but I have never heard of that making an appreciable difference. The voice coil itself is NOT a moving part in that it should not be rubbing against anything so there is no issue of a change in friction coefficient.

If anything, the resistive heating of the voice coil from usage should detract from sound quality by causing compression. As the coil warms up resistance increases and the output of the driver will fall. I would expect hard usage to temporarily adversely affect the sound quality, not improve the sound.
If you have a hummm in your system the speakers will worm up before you start listening...:-)
Audioholics did an interesting piece on measuring cone movements and frequency responses with and without break in.

Their conclusion: no difference. But, it still comes down to the "objectivists vs. the subjectivists" argument. Your ears and brain are the only important criteria.
It's all in your head.... er, I mean ears.

As you get into the music, it sounds better.
Sure, speaker probably do have a warm up time. Many contain capacitors, resistors and inductors that change as signal passes through them.

My Sound-Labs were very slow to warm up in spite the amount of time the electronics had been on. Sound-Labs back plates contain two large transformers, (one EI and one Toroidal). Also, 8 or more resistors (depending on which version you have), a brilliance control, switches for mid and bass EQ and several caps. All these are in the signal path.

No doubt there are other examples of speakers with similar parts, even if much fewer that this example.

As for the voice coil improving or suspension freeing up too? Could be, I would not argue with anyone who says it does.
Hpims got it...

It's the ears, inner ear components and most importantly, the synapses that connect our neuronal networks, that "warm up."
My system overall needs about eight hours to fully open up.

It's easy to know, it always sounds thin, closed and clouded when first started and the next morning is wide open when I leave in on overnight.

The speakers have two internal digital amps each. And when I turn them off and restart them, there is a noticable choking of the sound. It generally takes a few hours to return to the prior sound.

So, I leave the system on fulltime except during electrical storms.