To be more specific: the first JP6 (or JP7) model had a few options:
piezo;
matching headstock;
JP shield inlays (instead of little dots).
A JP6 (or JP7) with all three options was called "full loaded". If you order one with no piezo, the electronics would be just regular wired pots and pickups, which is what you want.
From the JPX onwards, all JP models became "full loaded".