Here is my dilemma. I have a fender American special jazz bass purchased in 2011. I used it heavily until 2018 and then started exploring other basses. Ended up finding my sound with Ernie ball music man basses. I have two 5 strings. Stingray special 5 and bongo 5. Both HH models. They became my two main basses. Two years ago, I decided it was time to change the strings on my fender jazz. I purchased a set of Ernie ball roundwounds custom gage 50,70,85, and 105 were the numbers on the strings. I thought I was using what came stock on stingray special basses. It was the first time I had purchased Ernie ball strings for a bass. To me my jazz sounds dead now. There is no where near the sustain that there is with my stingray and bongo and I don’t remember the jazz bass sounding that lifeless even though prior to the string change it sounded dull compared to the stingray and bongo. What do you guys think? Could it in fact be the strings or could it be that there just simply won’t be anyway to get a tone like the music man basses? I did try another fender bass and was also disappointed in its tone as well, and that was a Tony Franklin signature bass. There were flat wound strings on it though. I know this thread could easily fit on the basses thread as well.