Brian,
Thanks. We were powering them with the power supplies that came with the ME-1’s. We tried switching power supplies, switching cat cables. We tried everything and could only get those two to work. We updated firmware to the latest. No clue! We are up and running again because we were able to purchase a new hub, but still scratching our heads. They work perfectly fine with the Dante card and the hub, but directly from the Ace card and power supplies, we could see audio signal input on the meters, but heard nothing, either from headphone jack or mono out!