I thought that he played there because the strings had a lot of tension, sice they barely move when he plays.
The whole physics thing got me confused...I always thought that the fatter the string is, the fatter the tone is. But there are people saying that the floppier the string is, the fatter it sounds...![]()
I bet the reason JPJ's strings "barely move" is that he has a relaxed, economical approach to bass playing. Playing with a light touch is a good way to get a fat sound; if you dig in and play really hard, the strings "clank" against the frets and you get a lot of trebly noise.
There are many, many factors that contribute to a "fat tone." Strings are just one of these factors. For example, my 30" scale EB-0 with a .095 roundwound E string sounds "fatter" than my 34" scale Pedulla with a .105 flatwound E string.
Sorry if we confused you with the physics!
I was using the physics to try and explain my own personal real-world experience, not the other way around. My point was that you are making an assumption that fatter strings = fatter sound, and I was encouraging you to test this assumption before you strain your hands and your bass playing a .120 E string to sound like JPJ! Have you tried my experiment yet tuning your bass up a half step?
Back to your original question, though, my advice is buy a set of normal-gauge flatwound strings and try them out. I think they will get you closer to that sound in your head. I am a big fan of flatwounds and I recommend TI Jazz Flats. They only come in one gauge.