I have just spent a great week living with the Gryphon Colosseum. This is easily the best SS amplifier I have ever heard and light years ahead of the next expensive Levinson 33H's I heard a while back. I guess real class A is where the musical action is for SS.
The Colo will never sound strident or stressed and top to bottom coherence is spooky smooth with no real frequency bumps to enhance short term listening and longer term fatigue.
The music seems to almost float on a magic carpet of air. Bass, expecially bass guitar is exceptional with little or no unrealistic bass tightening when you wick up the volume - bass just grows with the music, but with better control, dymanics and depth vs tubes.
The midrange and treble is exceptionally clear and free of any of the usual ss artifacts, so pure is the transparency. Compared to my Mac tube amps the midrange is just a bit more forward, so lead instruments are a bit forward. My tube amps are quite relaxed and just behind the speakers in comparison.
Lloyd, the 31.5db gain in the Gryphon is just about the only issue that you may have, given the cj has a large amount of gain. It was Ok with my phono stage, however with cd, not much volume to play with.
My dealer and Gryphon says the Gryphon will sound a lot better balanced - he may be right there, but it may be more unforgiving compared to my cj ART - the old doubled edged sword.
The Colosseum certainly responds to higher bandwidth cables. They greatly preferred the extra extension at both ends of the transparent XL MM ref compared to the Kimber select 3033. They also luved teh expensive Gryphon power cable - go figure no short cuts at this level. The Colosseum does have fan, but is so well designed you don't really hear it - my room is very quiet so I do hear some air pushing when I am changing records.
Me, I cannot afford the Collseum and matching pre amp the Mirage so not sure how much I am missing. I will have a listen to the Antileon signature, which is supposed to be a little more tubey compared to the Colosseum. If I like that I might be able to stretch to listen to a Gryphon pre for full balanced sound.
Overall anyone wanting a reference amplifier look no further than the Gryphon Colosseum.