As I understand, all standard EMG's are active. I'm not sure they necessarily need a preamp, but they do need the right pods. Here's a thread I found involving people more knowledgeable than I. Is My EMG P Bass Pickup Active or Passive?
I used to have these same pups in a bass that was stolen. They were combined with the BTC system from EMG. Excellent results, clean, aggressive, plenty of bite.
But as for just joining them with just the pods, never tried it.
Let me know. They're going FAST!!
Just kidding...they're sitting in a box in my closet.