First when listening to the Dyn's I shut off the 7700 since the Dyn's have their own amplifiers. The Dyn's are thus connected to the DAC and 990. First each Dyn is plugged into a wall outlet. Second, the Dyn's using interconnects are wire to the 990's Zone2. Third from the DAC's left/right analog out to the 990's Aux In. Fourth a coaxial cable is connected from the Oppo coaxial to the Dacs coaxial. The Dyn's are not at all connected to the 7700. They are only connected to the 990.
I am using zone2 to listen to music ONLY thru the Dyn's.
When I want to watch a movie I turn the 7700 on shutting off the amps in the Dyn's while using the 7.1 mode in the 990.

Thanks for helping XM