I have an '84 Ric 4003, which I had Bartolini pickups put into years ago (passive). On the recommendation of Bill Bartolini, himself, I put the bridge pup in the neck position, and vice-versa. Ever since, the neck pup sounds horrendous! Nothing but mud. (Imagine the worst hollow bodied, 60's bass with flatwound strings and the tone rolled completely off! Yeah, it's that bad.) The pickup is virtually uselss, therefore I play with only the bridge pickup (single coil), and try to boost bass in the EQ or pre-amp. I am wondering if something could have been wired wrong when the job was done that would yield such a poor tone? One thing I will admit to doing (which may have been a bad idea at the time) was to file the corners of that pickup down a little in order to make it fit into the chrome pup surround from the stock pickup. I don't think I got into the windings, but thought it might be worth mentioning. Anyways, the pickup has equivalent output compared to the other...it just has the muddiest, least defined, punch-weak tone imaginable. Any suggestions?