I am a guitar player that switched over to the bottom end. The first bass I purchased was a used MIM Fender Standard Jazz Bass that had flatwounds. The type of music I play is rock (just to apply a very generic classification). I never cared the "boominess" of the sound, and some have suggested I try roundwounds for my style of music. Since I am left-handed and I just can't try different basses, I decided to get another bass to A/B them. Last week I got a G&L LB-100 which is a P-style bass. The bass was in perfect condition, but the strings felt really old. I would never keep strings on my guitars looking like that. Tried the bass during band rehearsal, and it still didn't have that "zing" I was looking for. I know bass players love old strings, but that's only when it comes to flatwounds, correct? I have some string cleaner that I never used, maybe I will give it a shot. Of course, since I am new to bass playing, most of my tone issues come from being a newbie and also not knowing how to set the amp EQ.