I'm probably one of the people who recommended Fender 9050L's in the thread you referenced, and I still think they are good all around flats. And, lots of Jazz Bass players here like them, too. For various reasons, I don't own a Jazz Bass, but I do own 5 basses with dual single coil p/u's as well as 2 basses with dual humbuckers that can both be split to act like dual single coils. And, they all wear different flats. So...
- '95 Alembic Epic. Yes, believe it or not, the pickups are single coils, but like some Jazz Bass pickups, they're hum canceling ones. I have TI Jazz Flats on mine, and it's the only bass I play strictly finger style, since I have trouble playing TIJF's with a pick. I use it mostly for Jazz, but it will certainly handle anything I want to play on it. But, IMO, TIJF's don't do a lot of the really Old School, Vintage stuff I like to play, very well. Not enough bottom end, and too much mids and highs...
- '98 Danelectro DC59 Pro. I set this one up with La Bella 760FX DTFs. Very light gauge at 39-96, they definitely give me "that Dano Sound". IMO, perfect for Surf Rock, and the Garage Band sound I grew up with in the early '60s.
- '98 Danelectro DC59 Pro. Yeah, I have 2 of them. This one wears... you guessed it; Fender 9050L's. With the Fenders, it's a very versatile semi-hollow body bass, that I can use for anything I want to play. And sound good, too. Probably not great for Death Metal or anything like that, but I don't play that kind of stuff. And when was the last time you saw one of those guys playing a plywood-and-Masonite Dano, anyway...?
- '01 Rick 4003. Honestly, I do think Jazz Basses and Ricks can sound a lot more similar than a lot of Rick owners will admit to. But, it easy to make them sound very different, too. Anyway, being a fan of the old, original Rick flatwound tone, my 4003 wears Optima 4440 RB flats - their very close copy of the original Maxima Flats that Rick's used to come from the factory with. And that I learned to play bass on, in 1968. Fairly low tension and pretty flexible, too. Slightly deeper tone than the Fender flats, but nowhere near as thumpy as "normal" La Bella DTFs...
- '73 Rick 4001. Because it's finally developing the neck problems that these pre-1978 Ricks are prey to, I have very light gauge/low tension flats on mine; Dogal JC106A Jaco CarbonSteel Flats. They're very nice strings, and don't feel low tension at all - a little stiffer than TIJF's actually. Their tone is... a lot like the Optima RB's, TBH. Very, very smooth, too...
- '06 Carvin LB-20. For reasons I won't go into here, the original owner had this bass built as a Rick 4003 clone. Including an optional switch that split it's 2 HB-50 Humbuckers into to single coils. I currently have it strung with the original generation Sadowsky Blue Label Flats; I'll let you read all the raving about how wonderful those flats are for yourself. I'll just say that I pretty much agree... The current Blue Labels are supposed to be just as wonderful, by the way... I don't regret putting them on the Carvin for a minute, but the main reason they're on it, is because I didn't want it to sound like my 4003. Because,
yes; with the coils split, it really does sound an awful lot like a 4003... And, finally;
- '20 EBMM 4HH Stingray Special. There's a pickup selector switch position that turns both pickups into single coils. It's not one I use a lot, but... I do use it. And, the Galli JF4505 Jazz Flats it wears, sound pretty darn good when I do. Tension is, IME, about average for 45-105 flats, and their stiffness is about average as well. Their tone? Good lows; really good low-mids and mids; and a decent high range, too. What I like most about them is that they are crazy mad smooth. Like, running your fingers across a wet ice cube smooth. This bass is extremely versatile; I can't think of anything it couldn't handle. And these Galli Jazz Flats are a perfect string for it...