You won't find a much bigger proponent of T-I Jazz Flats than me in these pages... I pretty much use them exclusively on every bass I have,
except for the two Turner Renaissances. I love 'em, they're great at what they do, Alembics, Turners, Guilds, Gibsons, name it.
There's just something about the T-I AcoustiCores that is very hard to describe, that when used on those Renaissance basses is magic. It's not the fabled 'upright bass' sound... and as a hard-headed old upright bass player, I'll go ahead and tell you there ain't any such thing. The closest I've been able to call it is like giant classical guitar strings. And it's so open to interpretation, you can do so much with it. There is a huge frequency response there. For what I do, most of the high end isn't really that useful, so I've actually started running through a resonant low-pass filter en route to the amp.
But I digress...
I think what throws most guys is the feel. The nylon core makes them super-spongy-feeling if you're accustomed to steel, which 99.99% of us are. And the bronze roundwounds are abrasive if you're used to, or just prefer flatwounds. (like me)
I got used to the non-existent tension easily, (and got so I kinda' like it to tell you the truth...) and Rick Turner himself gave me the best advice on the windings one time while I was b!tchin' about the sizzly bronze windings.
[posted this before, but it's been a while] One at a time, loosen each string a couple turns. Then, using a loop of 600-grit sandpaper, polish the windings down until they smooth out. You now have half-round AcoustiCores. I follow with some FastFret cleaner/lube and wipe down. They are extremely fast and smooth on both my Renaissance basses.
All that said - if AcoustiCores aren't your thing, they just aren't... nothing wrong with that. Jazz Flats are highly recommended too, and in the earlier pages of this thread there were some guys trying tapes and other strings out too.
