The catalog scan here shows the pickups are S90 pickups. Doesn't seem as though there's too much information on them out there.
http://www.ibanez.com/anniversary/expansion.php?cat_id=221&now=10
Mine is a Korean version. I don't have any other P90 guitars to compare it to. These stock ones sound decent if maybe lacking some warmth. But then again they are single coil P90s, right?
Just curious if anyone got better results upgrading. I have plenty of other humbucker guitars so I want to stay with the P90 sound, just maybe improve it some.