The EV tweeters I've heard have sounded much like other phenolic+linen diaphragm tweeters, which is to say very good indeed. The University horn tweeter and the Jensen RP-302 have similar diaphragms. As a class these tend to sound better to me than metal diaphragm tweeters- very accurate, clean and pure sounding, without metallic colorations. I think it is the self damping nature of the diaphragm material that is responsible for this. These tweeters are becoming more sought after and pricey all the time, especially the Jensens.