Imhiffan, thank you for your suggestion. This approach would require Y splitters and double input selections which I prefer to avoid.
robr45, thank you for your suggestion as well. Sound quality is the #1 consideration. I am trying to chart a "succession path" for the Denon as it is the oldest component in the system (other than the JBL's), and also achieve a more optimal preamp solution (where the $$ and space are dedicated to preamp functionality). I will certainly consider your home theater unit suggestion, although I would prefer a simpler audio-centric 2-zone preamp, if it exists...
robr45, thank you for your suggestion as well. Sound quality is the #1 consideration. I am trying to chart a "succession path" for the Denon as it is the oldest component in the system (other than the JBL's), and also achieve a more optimal preamp solution (where the $$ and space are dedicated to preamp functionality). I will certainly consider your home theater unit suggestion, although I would prefer a simpler audio-centric 2-zone preamp, if it exists...