Ah ok, its just I dunno about trying to force current to do all the work inside a pair of EMG-81's!! I don't want to fudge those bad boys up!! lol!

this is from the Z.Vex website: The Super Hard-On's input impedance is so high (>5 Meg) that it refuses any current flow from your pickup... maintaining the most magnetic field around each string, so you can hear exactly what your pickup sounded like the day it came off the winder.

So can I use active pick ups with it?

Well not like I'd need to, as obviously they would be doing almost the same job anyway, but just incase I get a z.vex and plug it on while forgetting its on when changing guitars lol!