I have to give a speech in my public speaking class and I'm doing it on the history and evolution of the electric bass guitar. I need to know what year the 5 and 6 string electric basses were invented and by whom. Ive been looking and cant find the info. Ive never been good at research. So if you happen to find it please post the link because I'll need to site my sources on my works sited page of the outline.