Hi I just picked up Hsu coax driver speakers $300 used, and holy smokes they are amazing. The reason is because I found synergy using $15K worth of electronics. I have another amp that cost me $800 but has tubes and the Hsu speakers do NOT sound good. I think the question isn't if this design or that is good but what will work with what. I had to send my main speakers back and needed something but had no idea these would sound this good. Shocked actually. So you could listen to these speakers and conclude they do not sound good because.... This was an eye opener for me. I think horns, coax, single driver, etc all have different compromises so talking about that is great fun but if we keep we want to hear sound/music in amazing ways then focusing on synergy is very fruitful.
I love this stuff.
jh