I tried it.....
Would there be an issue with sending the digital signal attached via RCA out from cable box to the X4000? I also tried it CD inputs on avr 3200 with x4000 zone 3 preout....no dice.
I know there is no issue with speakers, I problem solved it with direct rca Y connector.
For the love of god. somebody give me a <500 option at this point and I will buy it just to stop the W!.......but I know it should work.