Dear hifineubee,
I haven't have the chance to listen to the C1 for the consideration of it's high price in Taiwan. It costs US$11,000 here. Many years ago, it costed only half price. It is not easy to find a pair of C1, but there is a 2nd hand imported by the trade house which is C1 Signature with the selling price of US$6,000. The problem of dynaduio C1 requires big power amp. and the turn up the volume to get the music out of the enclosures. Big amp. also means big spending....... It is said that the tweeter of C1 has been used in the new Contour 30 which I listen once, but not impressive. Maybe the Amp. is not quite matching.