The biggest problem here is the built in preamp with your amp. I had a classe cp35 preamp and I still have the ca-100 amp. The cp35 was junk. I can't imagine how bad the integrated sounds. Well I'm sure it sounds good but I can tell you your other gear has far surpassed the capability of the preamp or whatever you would call it that is built into the integrated. If you want to be blown away try a passive preamp from reference line. My jaw dropped when I replaced my cp35 with one. Just get rid of that integrated or only use the amp part of it because your maxed out! I used to only notice slight diffrences in front ends also if any. After I got a passive preamp everything I've tried has it's own distinct character. From wadia to theta to audio alchemy It lets everything through. Or you could spend 2-3 times as much on a powered one to get the same sound. either way you need a new preamp thats the bottom line. I also strongly recommend a really good digital cable like the MIT reference. That also made a dramatic differance that was hard to believe. These two things were the best upgrades I ever did for my system. Oh yeah I'm also using the pioneer 525 as a transport and until I can get a dac 1 I'm using a $300 audio alchemy dac-in-the-box. I can tell you that this little thing blows doors off the 525 as a player so I can't imagine what you should be hearing with that great front end gear you have been trying out.
Am I deaf?
I've got three CD outfits here on loan from my dealer. A Linn Ikemi, a Bel Canto DAC 1 running off a Pioneer 525 DVD player and a Classe CDP. They all sound almost EXACTLY the same. After hours of switching cables, power cords and anything else I could think of, I did form a slight preference. And that was for the Pioneer DVD running straight into my amp! This freaked me out so much that I subjected my wife to the same test. She also preferred the DVD player. What in the hell is going here? Associated Equipment: Classe CAP 100 integrated amp, Sennheiser HD600 headphones, Von Schewikert VR3 speakers, Cardas and Kimber cables.