Pioneer PT R6 Super tweeter I have had an interest in Super Tweeters for over 25 years and have promoted their inclusion in loudspeakers. Recently Tannoy have made available an-add on super tweeter. It has been well reviewed. I have heard it briefly and like what I heard. I also got to hear a Ribbon Super Tweeter the other day. It sounded very good in deed. It was a Pioneer PT R6 but I have been unable to track any down in this country. Does anyone know where this device might be available in the world?