How to adjust my PUs pole pieces?

[BrandonBass]

My jazz bass' E and G have more output than the A and D strings, I wanna lower the pole pieces but have no idea how.

My dimarzios are fitted with model Js(they can be adjusted i believe), but it was installed by a pro and i didnt watch the whole procedure....do I nid to open the PU over? If so, then what nxt?

[C.Linton]

It depends on the pickup. Most pickups do not have individually adjustable pole pieces, some do. You can tell by the fact that adjustables will have some kind of "hole" in the top for some kind of tool, usuallly a hexagonal one for an allen wrench. If it is adjustable, you won't need to remove the cover.
edit: Just looking at the listing on Musician's Friend website for DiMArzio model J's, they are adjustable. You'll need an appropriate sized Allen wrench to adjust them.

[BrandonBass]

Hey C Linton thanks for the help! really appreciated. Now I notice they really do hav hex shaped holes....but its really annoying none of my 4 allen keys fit! off the hardware store

[BrandonBass]

Its really frustrating, i cant find the correct sized allen key!

[C.Linton]

You could try contacting DiMarzio directly, I suppose.

[walterw]

Originally Posted by BrandonBass

Its really frustrating, i cant find the correct sized allen key!

are you kidding? most jazz pickups aren't adjustable at all, and (more annoyingly) are not "pre-set" for a good balance.

you'll want the non-metric wrench for your model Js (3/32", maybe?). raise the two center pairs up 1/16" or so, and set the outer pairs flush with the pickup top.

afterwords, adjust the whole thing to be balanced bass-to-treble, and also neck pickup to bridge pickup (bridge close to strings, neck further away and dropped a little more on the bass side), and you should be good.