Fender MIM Deluxe Active Jazz. 4 String. Came with stock Fender Roundwound and tried some GHS Bass Boomers, which is what I use on all my other basses, and never liked the sound. sounded bright and twangy and the E string totally lacked any sound because of it. I have to run flatwound or groundwound. This also means the slaps sound muddy and dull. Stock sits with 2 Dual-Coil Ceramic Noiseless Jazz Bass Pickups. Looking for something to add a bit more low end growl and punch and allow me to play rounds again. Otherwise, do i need to change the pre?