This will not be much help but, I have owned the 6900 for almost three years now. I have had Thiel CS 2.3's and now the Vonschweikert VR4jr hooked up to it. It is one musical integrated amp! I have heard other speakers hooked up to it at my dealer (B&W, Martin Logan, etc.) and this is just one special integrated that mates well with many different speakers.
