hi. i just recently started playing my bass guitar that i bought several years ago. i love playing, but i seem to have a problem with my amplifier. it's an ampeg ba-112. the cord connected to the amp seems to come loose sometimes and creates a very loud distorted buzzing sound. i think the low bass notes make the cord rattle around, because when i hold the cord in place and strike the notes very hard, there is no buzzing. is there any way i can just replace the jack in the amp or something? thanks.