Dean Edge Q4 electronics

I'm more of a guitarist, I was gonna play rhythm guitar, but my friend didn't have a bass player so now I'm doing that. Anyway, I didn't have a bass but the drummer has one he found in the garbage, a Dean Edge Q4. I like the bass, it's in good condition and his father checked/repaired the wiring but they don't know. The point of the post is that I can't find a straight answer as to whether it has active pickups or an active preamp? I've searched but if someone knows for sure or has actually opened one up I'd really like to know. Thank you