I think I recall people biamping with two of the Panny, by connecting the cd to the first Panny, then the second Panny to the first via the digital output of the Panny.
Then you set the volume of each unit with the other one off, then power them both up, and the respond to the same remote at the same time, cycling up and down.
Not sure, just recalling what I read.
mark in Canada