This is a pair of Joe Barden prototypes made for Sadowsky. Split coil humbuckers. I emailed Roger to ask about these and he replied "Joe Barden made these for me to listen too many years ago. I have no recollection of how I liked them. These are not the pickups we use. Please visit our web site for additional information and let me know if I can be of any further assistance. Best regards, Roger Sadowsky" Could you ask for a more glowing revue? They come with Sadowsky covers but I think that's just what Roger threw them in to test them. They sound good but not great to me, I like a pickup with much more of it's own character. If I was prone to hyperbole I would say they don't color the true sound of your bass but they're just smooth and a bit flat to my ears. They're quiet, with a pretty nice p-bass tone in the neck position and they're one of a kind. I played them for about a year and a half.