Hi, I had a set of Zon Ultrasonic stainless steel string on my Zon, Sonus Custom Fretted 5 string, for about a year and I really liked the tone on the high strings but the low strings were getting a bit muddy. I changed them to a new set of Zon ultrasonics and the tone is a bit to ringy(zingy?) for me. I've been researching flatwound strings for a while now. A lot of the reviews are talking about the sound of flatwounds on passive basses, like P-basses, but not to many talk about active basses or graphite neck basses. Some of the flatwound strings that have been catching my attention are the D'addario Chromes and the TI Flats. The tension might be important seeing as how Zon's don't have truss rods. And how about the ball ends, the Zon has a quick release bridge. If any body has anything to say about flats on an active fretted bass with a graphite neck. Thank you TB'ers in advance for anything replies, T.G.