When I owned a McCormack DNA-1 Deluxe or standard I used the top screw type binding posts when I had spade terminated speaker cables. The Zu Audio WAX spades were a little larger than the norm and when I used the top screw posts on the DNA-1 they securely held the spade there and there was a lot of surface area for the spades vs the binding posts. I was definitely sure there would be contact. In my experience the either post worked fine. It is just a matter of preference.
McCormack DNA-1 Rev A question
I was fortunate enough to have purchased a DNA-1 Dlx Rev A from a fellow Audiogoner. The amp that it replaced is a DNA-1 Deluxe. Yes, I am moving up the food chain, and boy does it taste good. The question I have is what is the purpose of having 2 sets of Cardas binding posts for right and left channel? I know this is a 2 channel amp. I just connected my speaker wires to the bottom set of posts. My original Deluxe only has 1 set of Cardas binding posts on the bottom and it looks like there are some screw type of binding post above that. I couldnt figure this out so I had to ask. Thanks for your responses