i dont think the hum can be called feedback. But i aint no expert.

From what i experienced if you play your amp really loud and face your amp when you stop playing the bass from your amp will cause your string to ring wich cause feedback.

maybe the hum occur for the same reason as when you pick radio with your guitar.
Quote by BelowZero
you like bass sound. wanna go crazy on stage. and want a "place for a whammy bar"

have you been playing for two weeks?

go get a squier....

Quote by jess2112
I've heard of a guitar with five colored frets, but they don't play well.