Forget the Radian HCs, I recently upgraded from Ascents to Eidolons and found them 100 times better and much easier to drive than my Ascents. I also have a VT200 and I find the same grittiness compared with my CL150s with Infinicap mods. I haven't tried to replace the 0.33uF caps with Infinicap SETI but I don't think it's gonna make that much of a difference. I also have a CA50 which I bought "just for the heck of it" to play with and was amazed to see it drive the Eidolons very well with no difficulty other than playing the most complicated stuff like Beethoven Symphony Nr 9 or Firebird. The CA50 (YES! The integrated amp from Audio Rsch!) in its stock and beat-up state I got it in sounded pretty horrible until I replaced the coupling caps with infinicaps and retubed the thing. As far as smoothness and spaciousness goes the CA50 is the best. I know this post might get me flamed on this thread, but I am not bullshitting here. I just want to make the point that the Eidolon is 10x easier to drive than older avalons...all it needs is an amp that sounds detailed and smooth without the rough edges. My advice, sell the Radians and upgrade to better speakers first, or else you'd be wasting time searching for "monster current amps that sound liquid and smooth... an oxymoron."
Amps for Avalon Radian HCs
I currently own the Avalon, Spectral with DMA 150 amp, MIT EVO Shotgun interconnects and cables and am looking for an amp that will be warmer, more dynamic, more layered and with better depth. I am considering the Joule Electra Grand Marquis IV, ARC 200, REF 300, Jadis 800 or any other amps that give me just a little more magic. I've also considered keeping my electronics and buying Eidolons. One person has mentioned the Specraweld 100w OTLs from France but I have never heard of this company. I'd love to hear from folks about what you've heard that has blown you away. Thanks.