Does putting a P and H next to each other cause magnetic interferance?

[iohn]

The issue of impedance mismatch is significant. Back in the 70's I added 1 and later 2 Gibson mudbuckers to my Hagstrom. They are 30K resistance. They do not combine nicely with the 10K stock pups. I replaced the bridge mudbucker with a MM style pup with 10K resistance and it has the same issue. I have some isolation resistors in there, but they only help a bit. View attachment 5036636

How would I go about fixing that problem? It seems that there should be more people that have had this problem and solved it?