Re: What is it about DiMarzio's and Feedback?
I think everyone is going to have different experiences, but I've probably owned 100 Dimarzios in my lifetime, and some have fed back. The one thing that sticks out in my mind are the pictures of Steve Morse with what is basically bathtub caulk gooped into his neck pickup cavity, all around the pickup. I read in an interview that it was to stop feedback. That was the only thing they found that solved it. So for years, that blue Steve Morse model EB/MM that he played had a grey-colored goober around the neck pickup. But then (and I can't remember where) I saw Joe Satriani with the same goober in one of his red JS guitars. Maybe the two of them spoke, I don't know.
Anyway there seems to be a little bit of "bonk" to some of my Dimarzio coils. There's a little more handling noise, if you bump them, or tap on them. But overall that's something I've experienced on every pickup maker across every type of pickup. Some do it, some don't. So I don't think it's inherent in their design. They glue and/or caulk everything together, so it's a pretty solid unit when it's done. Their wax seems to build up more, like it's a thicker mix than what we use, or they run a little cooler so the pickup chassis takes on more wax, and holds onto it. I think consistency is the key. No one likes it when they buy something and it performs a certain way, and then the next one they buy is different.