Recently I started to experiment with pro amps, my reference is a wonderful McCormack DNA-2 and one of my set of speakers are Thiel 3.6, I got the opportunity to buy for good price a Crown I-Tech 9000HD and the result is something difficult to explain in words, it's crazy powerful (1500W for channel), made for pro use, normally no considered for home listening among audiophiles, snubbed and not worthy. I simply say, try it if you can, without preconceptions, then come back here to report your opinion. It manage the bastard low load of 3.6 as no other, cost no object, no trace of harshness in mid-high region, bass impact is unbeliveable with a great soundstage. Could no belive to such level of performance if I was only told about. Price is no cheap, around 8000$ new, but worth to give it a try before to go to conclusion. I will not get rid of my McCormack but the progress in technology is there for a good reason.