Specs are: Onkyo 503 and DM602 S3 w/ Nobelle High Fidelity wires; no interconnects,
You mean No terminations, using bare wire only. Interconnect is the term used for cables to connect a source like a CD to your amp. in your case a PC to an amp
there are two camps when it comes to terminations, one is spades, the second is bare wire. Both have its advantages over the other. I myself go with bare wire.
Bi-wire...same thing some say may difference, some say wala.
Get to know your system first, then start thinking of tweaking after a month or so. Changing components like interconnect cables and speaker cables do very little to the system compared to say changing the loudspeakers, at this stage (burn in period) you might not even notice any difference when using different amps
, let alone bi-wire