You know what's weird...I have a few different EMG model pickups in my ESPs. And I prefer the EMG-HZ ones. I never researched the info about the pickups so I was basing my opinion strickly on what I liked to hear and not the cost or level of the pickup model. I was told that the EMG-HZs are passive, so that might explain it having been a Rickenbacker, with stock pickups, player for so many years. I'm not totally positive the HZ pickups are passive, but if they are I think I like them for their honesty...you know what I mean...you can hear the string, the neck, fingers hitting the string. Active pickups add too much eq saturation for my taste, I mean I know they have more power, but I think that power they kick out of there sounds more like electronics than it does like the sound of the instrument.
Just my view on that. And like I said I have some different EMGs in all my ESPs, I don't know what exactly because the HZ ones are the only ones that say so on the top. But they are definitely the ones I prefer. I am eventually going to change over all the basses to the HZs.
SDG