To give us a better idea of the actual height if you can, fret the string on the highest position and measure the distance between string and pole piece in mm. That should give us a better idea.
A good way to methodically go about finding the optimal height is this: Set the PUs really high, maybe up to 1mm at the bridge. There youŽll probably get wolf tones, unwanted overtones and it will not sound too good I recon.
Then, lower the PUs step by step. Half a turn at a time is a good measure if you have done this before, for a beginner maybe a full turn at a time, as differences will be more obvious.
After each step, take a bit of time to play, at least 10min IŽd say so you really get a feel for how the PU sounds now. That also gives you time to adjust your gear accordingly to get the most out of that position (as you go lower you will probably increase gain, volume and especially the OD or booster you might be using).
Take actual note (as in writing sh*t down) of what changes each step. Also note which distance in mm you are describing.
Continue this until you are really far away. Go to rather extreme distances too, like 6 or 7mm, just for the sake of hearing what that does.
After that is done go back to distances you really liked and revisite them, thinning out the field.
At this point you also should try pole piece heights. For this I would take the biggest distance you noted as liking and start raising the pole pieces in the same manner you previously lowered the entire PU. I go up to having 1mm from the PU to the line on the pole piece where the "dome" starts.
Combining the findings you now have about PU and pole piece height you should be able to figure out your perfect height.
Yes it is tedious work, but it is worth it and will teach you a lot about how PUs work and how height affects the sound (which is somewhat different for each PU).
Finally a short idea on the effects of height I recently put in another thread. It if course is not very specific and the actual changes are much more detailed, as you will surely notice. For example overtones change a ton and those are very important, but very PU specific and hard to describe.
"I find that lowering the PUs takes out some output, makes them less hot and compressed and therefore adds back some openness and a bit woodieness too. Can bring out hights too. Generally cleans things up a bit I feel.
Raising the pole pieces while lowering the PU brings out brightness and makes the sound tighter and more focused imho.
I like my PUs set low with pole pieces raised, just the way it works for me."
Hope this helps a bit.
Cheers!
