Here's where I reveal how little I know about electromagnetic sorcery and whatnot, but a friend brought this up, and I thought "huh"? Is there any potential danger to having a bass(or guitar) sitting in very close proximity to a speaker for a long period of time? He suggested that the large speaker magnet could alter/affect the pickups over time. My thinking was, if it's even true, it would have to be VERY close, and for a LONG time, but I know nothing . . . . Any sense to this?