ianb696

I have a epi nikki sixx blackbird, a white epi tbird and a les paul bass and i use a laney rb9 stack. recenltly i been getting an earth buzz from all 3 bass guitars, i've tried different cables and other amps in different locations but the buzz is still there sugesting it lies in the guitars does anyone have any ideas why all 3 should get this at the same time.