Gonk, your point is well received, but 990 is controlling the output and just allow 1 source going out at one time. Besides, the chance of turning on both sources is rare but not impossible. I just ensure I do not turn on both players would be safe and I have a habbit of just turn on 1 player at a time and turn it off if not in use..,,, saving energy.
I might try the "RCA 2 FEMALE TO 1 MALE" cable spliter,from RadioSheck, which is of about $4 each. The cost is cheaper than the return cost of the S550 back to Sony. Tks.
Kwok