Yeah, that's a very unusual one. I'm not aware of any production model that had exactly that control layout. The closest model would be the AR500, but I'd expect to see a third Sure Grip knob (for Gain) as well as two small Tri-sound switches near the EQ toggle.
Of the models you mentioned, the possibility I can eliminate is the AR300 as every AR300 version I've seen has passive pickups (and so no battery nor any of the black control knobs).
The Artist models with active pickups are the AR400, AR500, AR550, AR3000, AR5000 and the AR5000RE (reissue). The AR5000s have vine fretboard inlays, so we can eliminate those. None of the other four has a control layout that matches yours.
So, the possibilities I can see are these: this is some spot model that was never featured in a catalog, it's some sort of prototype or guitar custom-built by Ibanez, it's been modified by someone along the way, or it's a "fake" or "tribute" not made by Ibanez. The modification explanation doesn't seem likely as there isn't any sign of any controls being added or deleted.
Does the headstock have a serial number stamped or printed on it? That would tell us when the guitar was built which might give us some clue on the rest.
