Tried to set up my new DAC yesterday and had a problem. I have my music collection saved in an external Buffalo hard drive so had this connected to my computer by USB. Connected computer to DAC by USB. Connected DAC to Marantz amplifier with 2 Chrimson Chord cables. At the back of amplifier the socket said DVD/Aux. Turned on DAC and only got a red light, there seemed to be no connection. Any idea where I went wrong? Had cables going everywhere. Would it be easier to get a wireless dongle?? Will there be any loss in reproduction quality? Thanks.