So have played a few shows with this set up and I am starting to notice a regular problem that I need to overcome pretty sharpish. Any advice is gratefully received. I am playing with a what I believe to be a hybrid bass strung with Gut a Like Swingmasters. I use a David Gage Realist going into a Sansamp bass driver preamp. From here I go into an Ampeg BA-115 and DI straight out of the Ampeg into the pa at every show. I use in ear monitors to avoid feedback issues and use a very low stage volume as the bass is being driven through the FOH. The issue that I am having is a loud boomy sound when I play certain notes. This is mainly the A, Bb and B on the G string. What might be causing this and how can I avoid it in the future?