I've been obsessing over an all original '75 Jazz in a shop but there's something very different going on with it tonally. It sounds great, but the pickups are the most aggressive I've ever heard on a jazz bass, it almost sounds like the bass is going through a very mild distortion or dirt pedal. The tone is really rich and growly in the high mids, even with the tone knob rolled all the way off. I'm playing it through a clean headphone amp, it's not clipping and it's not particularly loud, the volume is the same as a normal jazz. It's not a clippy distortion, it's a very pleasing tone, more like a bit of grit or hair in the high mids. Has anyone ever come across anything like this? Is this just a characteristic of Fender J's of that era? Or is it a sign that there's something up with the pickups? If it's not the pickups, could it be something else?