Hi Group, I am wondering if other people have experienced the following before I contact Shuttle on the matter. I have two SN41G2 Shuttle XPCs both with the CA-10 SP-DIF card fitted. The optical SP-DIF in & out work fine. However, the coax Digital connections are a different story. The coax output works fine but the coax input does not work at all on either machine. All I get is effectively 'white noise' or similar. I have tried a DVD player, CD player, amplifier and even another Shuttle to feed a signal each with exactly the same result. All of the above work fine when connected to the amplifer inputs. The only way I can get the Shuttle SP-DIF coax input to work is to temporarily wire in a phono socket directly back to the SP-DIF header. This works fine!!! Looking at the rather poorly designed board layout it appears that the coax and optical inputs are paralleled togther rather crudely. Could it be that the optical input is interferring with the coax signal as it is the only active component on the board!!! If anyone has this card have you tried the coax SP-DIF input?? If so, can you please tell me your results. Thanks Paul