The MR902-16HF super-tweeter is a 16 ohm 902 driver and small Mantaray horn on a bracket. The horn is very similar to the Mantaray used on 604's. These were used primarily by Japan. It seems the Japanese like lots of sizzle on the top, even in arena or stadium installs. I have seen photos of large clusters with rows of MR902-16HF horns mounted to the edge of large-format MR horns. I have a data sheet that I can send you.