I have recently purchased these switchers (I was just running either SACD or DVD-A at a time for the last few months...which was a big hassle). When I first got my DVD-A player, I tried hooking up 6-channel using cables supplied with various components collected over the years (el cheapos). My subwoofer sounded like it was going to explode. I switched out some stock $1 dollar cable for a digital coax cable I had laying around, connecting it to the sub output. Everything sounded much better (even though I don't know if digital coax is a preferred sub output IC). Now that I am going to be using this switcher mechanism, should I go out and buy 2 more digital coax cables for the sub connection, or should I buy 3 new sub cables, or could I just use any cable for that connection? Thanks.