I have a problem with one of my basses. It sounds like there's some distortion coming from my bass. I thought it was the cab and speakers but once i use a different bass its gone. I did a bit more and found that when I blend the bridge pickup on full I get the distortion and no distortion when I use the neck pick up only. From what I am figuring is that the neck pickup is messed up somehow.. I tried lowering the pickup but that did not work. The distortion is heard al all volumes. Is there a chance its the preamp still? Im fairly certain its the neck pickup.. but if anyone knows another way to test, that would really help. I dont have money to spend on a new pickup to then find out its the preamp..