I own the Evolution Ones, the earlier (and nicer looking) version. The Evolution Twos probably sound a little bit nicer, but I think that I can say, to my ears, that my E-1s are the nicest sounding speakers I have ever owned... And possibly the nicest I have ever heard with the caveat that different speakers do a bunch of different things that other folks like et al.
What the Evolution towers do well is project a wide, natural, and precise soundstage. The combination tweeter/midrange and those magnesium and beryllium driver are incredibly accurate. The bass can reach down to 20Hz but perhaps not as convincingly below 30Hz as other speakers; the bass response, however, is natural and plentiful. What is most impressive is what they do NOT do. They are very neutral, with little emphasis at one end or the other(s). What goes in is what comes out.
What I like most about my E1s is how well they sound at moderate (60-70db) levels. That is where I listen the most and I notice nothing missing at quiet levels. I rarely crank them up past that point and, in fact, frequently play them at lower sound pressure levels with no sacrifice in sound quality.
I do not know if these speakers are more or less power hungry than some others (they are similar to most others I have owned in terms of power efficiency), but they will respond well to high quality amplification. Most of my power side is vintage Luxman stuff, and the E-1s sound nice with my ~80w L-5 integrated; they sound VERY nice with my ~200w Luxman B-12s. Any top-level speaker will sound only as good as the electronics driving them.
I have owned and listened to many, many excellent speakers, but these TADs might very well be my last. Coming from someone who sought the best sound for years means a little something. I was willing to spend twice as much to get what I wanted. I cannot think of any reason to let them go except perhaps for a similar pair of TAD Reference models.
HTH
