Thanks for the response guys, appreciate it....
Al, Definitely not 2 bridge pickups, pulled them out and checked today...Have also got the treble end of the pickup raised high..
I have no qualms about disrupting it's 'vintage', it's a mex and is my workhorse bass, just want it to sound as good as possible..
Stacker, i too have not seen a J bass with single poles since it's purchase some 12 years ago....clearly it was a brief and unsuccessful experiment!
I am going to call Wizard Pickups and get some 64's fitted i think as i tend to play with flats on it....any idea whether this will be suitable for an active deluxe?
If it still isn't right i think i'm going to investigate a replacement bridge.....any recommendations? Badass or Gotoh etc? not sure of the difference if I'm honest!
Dave