I've had my 4 string stingray since the mid 1990's. recently i have been playing a lot of gigs and recording in the studio and everyone (live sound guys, studio engineers, audience members) has been telling me that my bass sounds horrible. I'm not sure what to do. The D and G strings are basically dead. When I play notes on those strings they are significatly quiter than the top two strings. In addition, the E and A strings are really loud and sound distorted. I've taken the bass into the shop to get some lovin' but that didn't help. I've changed the battery several times... no luck. I've tried every brand of strings i could find... nothing. I'm about to give up on it, but i love the bass so much i would hate to do that. plus, i play funk music, so the stingray should be perfect. any suggestions would be appreciated.