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I'm not familiar with your Cary power amps, so I don't really know if a PL amp would improve on things for you. But I've owned a Cary SET (572se) amps and they had excellent bass!
My suspicion is that you may be right, and you may have to give up the warm glow of your CJ pre in order to get much improvement in the bass.[/QUOTE]
The CAD 50s are similar to the 572s, same chassis and transformer. I heard them side by side in about 2000 and thought the 572s were wonderful and somewhat similar to my amps.
I'm doing a little tube rolling in my preamp today to see if that helps
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VPI / JMW arm, with Dynavector 20 (also Technics 1200mkII), Luxman 505u integrated, Marantz 8004 SACD/CD, TAD/Pioneer S-2EX speakers, GIK room treatments