not trying to burst your bubble. just trying to help but
they can be wired to a preamp but they still wont be "active"
here are two links the emg link says nothing
the stew mac link states it in quotes
like i said im just trying to help with this info
http://www.stewmac.com/shop/Electronics,_p...For_Guitar.html
http://www.emginc.com/displayproducts.asp?...;catalogid=154#