My Spectral experience was not a good one. I bought the system that Harley reviewed, they marketed it as the "2C3D System": DMA180 amp, DMC20 mkII preamp, MIT/Spectral cables, Avalon Radian HC speakers. It was all purchased from one of the top Spectal/Avalon dealers in the US. They set it up in my home, and chose the placement of speakers, etc. Long story short, the sound was uninvolving, and couldn't hold anyone's attention for more than a few minutes. Long listening sessions became a thing of the past. I was mezmerized by 3D soundstaging during the in-store demo, but after more listening I realized that images had no body. Detail was etched. I heard gobs of everything; everything but music.
While I'm sure Shubertmaniac is happy with what he's hearing, I must respectfully disagree w/the statement that "Once you experience its pleasures all tubes seem euphonic and all other solid state seem sterile. Spectral is neither euphonic nor sterile." My experience was that Spectral was a huge disappointment; boring & lifeless.
After living w/this system for a few months, I was thrilled to unload it and move back to tubes. Even though I took a huge financial loss when I sold it, it was a great relief. It took me a while to find components that give me the things that that system did well, but it was worth it. My only regret is that I didn't get to try the Radians with some good high-powered OTLs such as Atma-Sphere MA1s. Since then, I've heard tremendous sound coming from Avalon Eidolons driven by Atma-Sphere MA2s.
It just goes to show "Be careful what you wish for".
One last point is that most of the time I've seen favorable comments on Spectral, it's from those using digital front ends. As we all have different sonic priorities, let me say, vinyl lovers tread lightly. The things that good vinyl playback does for me is exactly what my Spectral experience didn't do for me. Cheers,
Spencer