Audiozen, I can only assume that you did not read the article at the link I posted earlier so here it is again:
http://www.atma-sphere.com/Resources/Paradigms_in_Amplifier_Design.php
None of these are what I would call the top transistor amplifiers and they all sound pretty much the same to me. You may disagree with me, but that does not make what I said any less correct (I tried not to waste my time at MIT Minnesota). There really are speakers out there that need an amplifier with low damping factors and they will sound terrible if you use such amps as you listed. And no speaker known to man needs more than 20:1. Damping factor is mythological.
http://www.atma-sphere.com/Resources/Paradigms_in_Amplifier_Design.php
The top mega-buck solid state amplifiers all have
in common very high damping factor number's. A list of some of those amps..Soulutions 501 and 700 mono-blocs have a damping factor of 10,000. Simaudio Evolution 880-M, damping factor 2000. Simaudio Moon 400M, damping factor 800. Accuphase A-200, damping factor 1000. Parasound JC-1,
damping factor 1,200. Hegel H20, damping factor over 1000.
All class D amps have damping factors at 1000 or greater on average.
None of these are what I would call the top transistor amplifiers and they all sound pretty much the same to me. You may disagree with me, but that does not make what I said any less correct (I tried not to waste my time at MIT Minnesota). There really are speakers out there that need an amplifier with low damping factors and they will sound terrible if you use such amps as you listed. And no speaker known to man needs more than 20:1. Damping factor is mythological.