I've got an old Aria Cardinal bass - it's a cheapy, but I currently use it as my number 1 bass in preference to my Ricks. It has an incredibly powerful, ballsy sound, like a precision on steroids. My problem is that it has suddenly and inexplicably developed a very middley sound which emphasises the percussive edge to it's sound. My first thought was that there was a poor connection somewhere, but opening it up reveals that the wiring seems fine, with no change in sound when poking about with the wires. Anyone got any ideas what the problem could be? It seems unlikely that it could be a dry joint (unless they can develop after 25 or so years) and I've never heard of a pickup just developing a mid range emphasis. I'm at a loss, so any advice is welcome.