I have 2CE's (the older version) and have heard the new ones. They are not bright speakers, rather they are a bit on the warm side of the fence. In addition, Marantz gear's "house sound" is warm and usually slightly rolled off at the top to my ear. So you have two warm items added together and are getting thin, cold sound - something doesn't add up. The previous poster suggested speaker placement - these speakers are hard work to place properly - I Can possibly give you some tips.
What is your source?
What is your source?