Keith Johnson, if I`m not mistaken the genius behind Conrad Johnson, developed Spectral amplifiers. I had the pleasure years ago at the premiere high end shop at that time in New York, Lyric Hi-Fi of having a demo. I heard the Spectral combo (amp and preamp) with Infinity IRSes. The cleanest, purest sound I had ever heard. Every note, instrument seemed to come across so easily. I heard things I never heard before.
However, no one seemed to carry their gear, other than Lyric. And very, very few reviews. So, anyone here on the forum have experience with one of the best demos I have ever heard of an amplifier?