Y-splitters for RCA jacks are just that, splitters. They can't be used to combine to outputs into one input.

It'll be up to the player as to if it can be configured to have the surround back outputs disabled, and if it mixes them in with the side surrounds.


Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris