Thanks for the input. Yes, the Pioneer does have separate “pre-out’s” for the sub, fronts, surround, and back speakers.
So, if I wanted to have the Carver run the fronts, would the set up be: run the pre-out on the pioneer for the fronts to the main in on the Carver, (and thus connected the front speakers), I would use the volume control on the carver for the fronts only. The volume on the pioneer would only be controlling the center and surrounds.
Sorry for what probably seems like simple questions.