justgpl

Hi everybody: I have a new Gibson SG Basss EBO3 with aq neck pickup and a bridge pickup,. I am having a problem with E string being about 20% lower volume than the ADG strings. I have been back to the dealer with not much success and I have tried new strings I have tried backing out the E string screw in the neck pickup and the problem persists..Please can anyone give me some advice, I cannot return the bass and I don't want to hide it in a closed, thanks for any and all help