I had the Classe CA-100 power amp and it drove my 4 ohm speakers with authority and body like none other in my system. I lost my mind and sold it to try many other amps, none that have been the equal in overall balance, authority and soundstage.
After a lot of research this is the pre and cdp that I would have match with it.
CP-47.5 preamp is a very fine preamp (latest version cp-35 is also quite good)
CDP-10 cd player is a very fine cdp (cdp-1.5 & 3 are also good)
I hope this helps.
