I'm not a bass tech so some help to see if I'm thinking right ....on my fender jazz deluxe and warwick stage 2 ....the E and A string boom ...and the D and G not so much ...I want an even tone across all 4....I'm guessing I need to lower the bass end of the pickups and elevator the high end on the pups ...on both the bridge and neck pups ...is that right or is there other tricks I could use ...thanks very much