I'm totally new to hifis so am wondering if someone can help me out regarding cables. I have a CD player and an amplifier. They came with a cable joining the amp and the CD player which has 2 plugs at each end, going into the 'L' and 'R' sockets of each item. However, from what I've read, it's probably worth upgrading this. I understand I need something called an 'interconnect'. From looking at online shops it seems they only have one plug at each end (can someone confirm?). Therefore do I need two of these (i.e. one to go from the 'L' socket on the amp to the 'L' socket on the CD player, and another for the 'R' sockets)? In case this helps, I have the NAD C352 and the NAD C542. There appears to be digital sockets on the CD player as well, so is it better if I use these? Thanks in advance for any help on this basic question!