You wouldn't happen to be using an amp that has Celestion G12T-75 speakers in it, would you? Or another type speaker that has similiar accentuated low end
voicing?
A couple years back I had a Dean Icon guitar that had a very boomy sounding low E string, and I tried many of the methods above to try and resolve it. Including the Demud Mod and even replacing the stock passive pickups with active pickups. And running the guitar through a EQ pedal where i cut the low frequencies a lot. None of these actions fully resolved that boomy Low E problem. (The Demud Mod and then later changing to active pickups did help a lot, but neither resolved it 100%)
Months later, I decided to sell the guitar - partly for that reason. So before listing it for sale, I returned it back to stock condition. And so after rewiring all the electronics back to stock condition, I had to naturally plug the guitar into an amp to listen and test that my wiring work had no issues. And I discovered that the boomy low E problem was gone. I thought about it and realized that I had recently replaced the G12T-75 speakers in my amp with different speakers. That was the only difference. So apparently the speakers were the cause of the problem.
EDIT: I should have mentioned that the Neck pickup was a PAF style humbucker with an A5 magnet.
