@dprendergast Pleased to hear you got it going. The connections on your amp are very unusual and far from intuitive.
As you may have read, I am shortlisting two or three KC62s in my system. Opinions seem to be divided. Some say the new tech is a breakthrough that enables small subs to perform like larger ones. Others say a small sub can never produce strong deep bass. Most reviews are very positive, at the 9/10 level.
It will be really helpful if you will report your findings after you have run them in and listened for a while.