The only time I use my rear speakers is while watching movies, so I built a switch that I can use the send the rear amp signals to either the inside rear speakers for movies or the zone B Algonquin Outdoor Speakers to stream music while we are out by the pond.

M80v2,EP500v2,VP150v2,4xQS8v2,Algonquins V3
Denon 3808CI
Oppo BDP-83
LG 55LW6500