Audio: Sound, especially when recorded, transmitted, or reproduced.
Phile: denoting fondness for a specified thing
So an audiophile is someone who has a fondness for sound, especially when recorded, transmitted, or reproduced. So if you are reading this you are probably an audiophile or you wouldn’t be here.
Explaining it easier if your friends have similar interests but if they are truly your friends you don’t have to explain anything.
I just say it sounds better and I like it we then share a can of lubricant charge up and finish the vacuuming