My Yamaha NS1000m use those tweeters. Howevwr the B&W Nautilus 803 sounds way better.
Beryllium Tweeters
I've only heard Paradigms Beryllium Tweeters but I absolutely loved them! What other "affordable" (>$2k new or used) speakers use them and what are your experiences with Beryllium tweeters? What other Tweeters rival the extension, air and sweetness that I was hearing with my Paradigm Sig 2's? DeCappo? Usher? ...?