I guess I'm not a REAL expert because I don't know the answer to this question:
Why does a 7.72K alnico 5 Jazz neck humbucker sound brighter, cleaner and have less bass and lower output than a 7.43K alnico 5 59N?
I would think that all things being equal, the 7.72K pickup would have higher output than the 7.43K pickup.
Guess things are not equal!
So what's differant?
Are the magnets a differant size in each pickup?
Is the copper wire in the two pickups differant in some way?
Are the coils unbalanced in the Jazz so that the Jazz is a little brighter?
Now that the Jazz is a 4 conductor pickup, I'll have to make some measurements and see I guess! And maybe open one up and check the magnet.