When playing sound on a MP3 player to headphones, does the volume level affect how much power is used? Intuitively I think that high volume = high power consumption, and low volume = low power consumption, but that's just an assumption.
I know this is a very general question, as it will probably always depend (at some level) on the specific device.
Would the answer change depending on what was plugged into the MP3 Player? (Nothing/Earplugs/Large headphones/AC powered stereo through AUX)