I agree with the above comments. The Antals are superb speakers, I had a pair of the XS which I sold to dabble in time and phase coherent designs, but I miss their phenomenal speed and dynamics. I got the best sound driving mine with an ASL 50 watt tubed integrated (AQ1001DT). I got the distinct feeling that 50 watts worth of tubes was waaay more than enough; I could literally move the earth with the volume knob about a quarter of the way up. As others have said, the Antals are super revealing, so you want to feed them something rich and grain-free--ie, tubes. I got tolerable results with an Audio Refinement integrated, but the tubes are a better match. One of those "you don't know what you're missing until..." kind of deals. Check out ASL, Jolida, Cayin, Golden Tube etc. BTW another nice thing about the Triangles is that they sound great with Triangle's TC-4250 cable, which can be had for a measly $4.50/foot. So much for endless cable hassles!