I am still using a CA301 with a CP 65 pre and never have found it lacking in bass. It has been used with smaller Northcreek Revelators and larger Vandersteen Quatros. It was tried at a friends house with Eggelston Andras where the bass performance was very good. I have found the lower registers balanced with the rest of the spectrum not delivering the overemphasized slam some other amps are known for. Even when driven hard the amp only gets moderately warm. I have also auditioned the newer Classe Delta 2200 and did not find it a significant enough upgrade.
Classe ca 301 is the low end weak.
This unit seems to be build like a brute powerhouse yet I have heard a few reviewers that claim weak bass does anyone own this unit, I am considering purchasing it or a bat vk-500 my system is b&w 804 bryston bp 25 sony scd 1. other considerations would be threshold t 400 my price range is $2200 max.