I think I got it sorted. The kick output from addictive drums is assigned to a Sonar track. When it is routed direct there seems to be no control in AD for output. It is acting like a line level out, into Sonar. As it turns out, it was overloading the EQ, or any module inserted first in the Pro Channel. The Quad Curve input meters were unable to track the percussive hit of the kick. Once I watched the meter for a long time I would see the occasional clip indicator if there was a sustained overload. Most of the time the meter was indicating -12db. I had to go to the top of the console and Reduce the input with the trim control.
Always good to learn something. The meters in the Quad Curve are some type of averaging, I guess rms.