I have read a lot about the coveted 60's Jazz bass pickups and their sound compared to every other era Jazz bass pickup. I own a 78 Jazz bass and I find the sound of these pickups awesome, with very little hum and no irritating ground buzz. I owned a Geddy Lee Jazz and the construction was great, but the sound was lacking and the ground buzz was horrible. All the pickup companies out there have a Jazz pickup with a 60's spec. What makes the 60's pickups greater then all the rest?