I own the Alkibiades. I use them with a 15watt KT88 amp and an 8watt 300b amp. In the near future, I'm going to add a 211 amp. All single ended amps. I too am friends with the importer. He's a stand up guy -- calls it like it is, and believes passionately in his products. Jeff will speak honestly with you about other HE designs. Once I figured out what I like from a system -- which is dynamics, fully bodied cohesiveness, scale, tone and timing -- I've yet to hear a better range of speakers that can deliver it. I've not heard every Horning hybrid speaker -- just the Perikles, the Agathons and the Alkibiades. I think the Perikles is the biggest bang for the buck.