I too recently put them in my Carvin thanks to Chucko58 and others on here. I have played Bartolini's, Ken Smith's, Duncan's etc...and for the price, the clarity and tonal range cannot be matched. Some will argue that Nordstrand or Delano's are "better" but you're also looking at 2x the price for something made by a "kid" compared to one of the most sought after original pickup makers in America.
It is a very clean, noise free, balanced tone with a wide range of tone, especially if you have an active 3-band. Some would call it "modern" but I think you still achieve that dark jazz tone that some would call "vintage" with these with the right finger positions and bass guitar. To me, I'm not big into labeling sound quality when it's excellent sound quality. I can't really explain in words exactly how much more "clear" the J-45s sound compared to Barts and many other pickups. And...because the pole pieces are raised in the center gradually, you have a much more balanced tone where as before you probably had flat pickups that scooped out the mids.
It takes a little getting used to but I love them now and wished more people would consider Bill Lawrence (Wilde) pickups. Not his competitor copy cat guy using his name.
**edit**
Also, when you go to order them call about once an hour until you get an answer. I seriously had to try their line about 4x until I received an answer as they don't have a fancy 800 number that has call waiting and all. And if you need dimensions, they are all online. I ended up buying 2 bridge pickups since my Carvin has the same size j-bass pickup cutouts. Becky from Wilde pickups said that this is very common and nothing to worry about. The only difference she said is the neck pickup has a slightly lower output to compensate for the position, but all you do is lower the neck pickup a bit if you purchase the bridge one. It's pretty simple.
