So I've got an Ampeg classic series 4X10 and an old Carvin 300 Watt rack head with my Fender P-Bass with Emg's. It sounds like crap. No matter how much I mess with it. I want to get a decent rock n roll tone out of it, but it's just too bright and wet sounding. When I take down the treble or take the high end off, it sounds like low end mush. I play with a pick. AHHHHHHHHHGGGGGGGGGGGGG! Any advice on some better tone? (Other than, get a new bass)?