So new fender rumble . I've done 2 rehearsals with it and no problems . Gigged with on Sunday and halfway through the 1st set I noticed quite a loud hiss/buzz. During the break I realised the tweeter was on so I switched it off and it all seemed fine even when turning the tweeter back on . Have been playing around with at home and I've noticed that there is a slight buzz up at gig volume which is more prominent with the tweeter on. With a stingray active pups the buzz is even greater still. And finally with my p bass, as soon as my thumb comes into contact with the plastic pickup cover the buzz increases significantly. What's occurring! Dodgy amp? Dodgy basses or dodgy bassist?
p.s have tried 3 different leads and different parts of the house.
The Swamp City Shakers