i just got a set of fralin's split coil jazz bass pickups yesterday and installed them in one of my jazz basses. i have previously tried the following pickups in this bass: duncan sjb-1n and sjb-1b (set) fender AV RI (set) duncan classic stacks STK-J1 (set) duncan hot stacks STK-J2 (set) Dimarzio Ultrajazz bass pickup #DP149 and now the fralin split coil (set). the duncan sjb1's are by bar my favorites for a stock jazz bass tone (complete with hum in the individual pickup modes ), and IMO, the fender's sound almost exactly the same, just a teeny bit not quite as detailed. i found the duncan classic stacks okay, but had low output and were a bit thin sounding. their hot stacks were very nice, with a little more mid bump than the others, and completely hum & noise free. now onto the new fralins. first, they have no hum and are very quiet. their top end is a little muted which is to be expected for a series split coil pickup, and is actually okay with me. i've found that they do have a 4 db bump at 1K which gives them some burp & growl, but it's a little too much for me, so when i cut 1K by 4db on my amp, they really open up, sound less cloudy and stiff, and their high end is much more present, transparent, and open sounding. IMO, they would be perfect if Lindy could somehow get rid of the 1K bump, but i'm going to leave them in there and see how they sound at my next gig with a full band. i gotta say, that it is really nice to have hum cancelling pickups in a bass that is used for live gigs, with the way that some of the dimmers and neon sign wreaking havoc with standard single coils, since i mostly run my j basses using only the neck pickup, so if these fralins don't cut it, i'm going to try the duncan hot stacks in it again (since i really loved them and probably shouldn't have taken them out ), but IMO, the fralins do sound a bit more like a standard single coil, and especially if i cut them a little @1Khz.