Does altitude change the sound of speakers??

They should always sound better when you're high!!

I like D_S answer.. hee hee.

The air is thinner, thing are bound to be a little faster and with less pressure on the old ear drum, ay? But give it a little time, just like you for the altitude change.. Interesting though.. Humidity is right in there with SQ to...It all plays into "The sound", ay?

Would it actually be a lower spl with the same watts or not? I gotta think on that one a bit. $ for $ would you get the same SPL at sea level as one, two, or what about 4 miles up. Everest? Can you hear anything up there. 
With no air, no pressure, little air, little pressure, Right?

Regards

That is why EBM live's in a Penthouse. Ultimate SQ!!! 👍

So if the rooms are not exactly the same, of course there would be a difference in sound.

The change in the listening room itself probably dwarfs any changes in altitude.