I have an Italia Modulus 3 with a strange pickup problem.This bass has 4 pups,one for each string.The G string sounds like it is being run through a compressor,also when played with a pick or fingers,the downstroke has a full sound,but when played on the up stroke there is a lack of volume/tone.
The bass is set up perfectly,intonation is spot on,there is no fret buzz,the pickups are all reading the same output.
I thought that the pickup heights were wrong,i had the same problem years ago on a strat,so tried all pickups at all heights,and the problem is still there,it's driving me mad.