Revel made these mid drivers themselves as they could find any that were good enough for what they wanted. They are really great mid drivers but very hard to remove ( I managed to get one out without destroying it even though the designer has said you have to damage them to get them out of the cabinet) . If they are rubbing/scratching you may have to get new voice coils wound onto them or as in my case, there was some debris in the voice coil gap ( another post mentions the magnets peeling ) and my tech was able to remove it and reassemble the driver without destroying it but that is one tough jobs!
