Both A and B are clean. Direction does not matter. This is important for folks like me who already was using OpticalRendu. Without B->A option… I wont be able to use ER.
Me: Yes Switch -> ER(Side B) -> ER(Side A optical module) -> OR?
Alex Crespi: That is correct
Me: So connecting Switch -> ER B -> ER A -> OR compromise SQ? Or direction does not matter and we still get all the goodness?
Alex Crespi: Yes. We went to extra trouble and expense to make the EtherREGEN symmetrical about its moat (i.e. differential clocking and reclocking and all super voltage regulation is the same both sides) just so that B>A performance would be equal to A>B. Only reason we did it was for optical endpoint users (opticalRendu).
Also, customer service quality I get from Uptone audio is awesome. Every time I ask a question. I get precise and prompt response from Alex. He is just awesome.