A couple of friends have CDA amps. Take my impressions (listening through their systems) with a grain of salt.
Compared to a Crown 1500 (how is it nobody has mentioned that one?) on the same system it was more detailed/dynamic/forward but a bit rough to my ears.
I have old Channel Island Audio D-100 mono-blocks that IMO beats both of them, but the new versions are much more expensive (I'm sure they sound even better).