hello, i just got a warwick corvette std. ...and it just won't stop buzzing . i'm not sure if this is an amp issue, though i did try my accoustic/electric and the problem does not occur. any advice? it's not the cable or eq (that i know of). oh, and when i tilt the bass in different directions, i get in one spot that won't buzz, but it's upside down and unplayable.