Does altitude change the sound of speakers??

Funny you say that. I've actually seen a flight attendant going down in style on a stiff one.

Oh, that was you in 2C?

I live at about 1,400 feet, and visit my hometown often, which is about sea level. Altitude tends to effect the pressure in my ear drum. I always tend to hear everything better at sea level, not just speakers. I think multiple factors play a role. Pressure inside the ear drum is a much bigger factor than air density in the room. 

Make sure you increase the timing by a couple ticks and lean out the carb. She’ll run fine. 

I'd like to intro our new motel chain....

Notell Motel
"We'll clean up after you....and we've got the vid. ;)"

@isochronism ....(re your 1st post)...Yup, altitude don't matter...'attitude'? You Bet! *L*

'High' efficiency will depend on what you spend....;)

Geo, hey!  'Seismic'?  What are you doing that makes the earth move?
Too much 'sub'....or what?