UPDATE on Sonist Audio CONCERTO 4 speakers. I have these up in my listening room now and I'm playing them every day for hours with no listening fatigue, just great sound. The best thing, of course, is that I can use my low-watt amps and still have full dynamics and natural sound with just 8 watts a channel. That is a tremendous thing for me, as I believe that low-watt single ended class A amps are some of the best sounding you can buy. So, I'm switching off with my Woo Audio WA5 300B stereo amp and my Audio Note Jinro 211 integrated (17 watts) and my WAVAC EC-300B and I'm having fun, fun, fun! 8 watts or 200 watts, makes no difference to the CONCERTO 4s, they handle everything nicely. When I had the Audio Note 2A3 amps here (on their way to the San Fran stereo show right now) they worked just as well.. What I like about the Sonist Audio gear is that it is (for this type of musical presentation) very reasonably priced. With my PS Audio digital front end I even bypassed the preamp with the WAVAC and just used the digital volume control on the PS Audio and it worked nicely, pure Western Electric 1938 300B sound, effortless, balanced, dynamic and totally crankable. In fact, these speakers can rock, they can be subtle, they can do whatever is thrown at them, very well. The fact that these are not horn speakers means that I can play for hours without ear fatigue, important to me because I listen for work and for pleasure. So it's fun playing with my low powered gear, something I had not been able to do for years and years because the speakers I have here all require JUICE to make them sing. My Tenor Audio 350m monoblocks provide that juice but I'm enjoying 8 watt playback just as much as my 350 watt a channel system! Recommended for you single ended triode lovers, everywhere.