I have a Yamaha RX-V740 reciever and on the website it says that it has a DAC in it but all of the inputs are RCA cables and don't those run an analog signal?  Also there is a fiber optics input in the front but I thought that was for mostly video, correct me if I am wrong and sorry for the...

My friend gave me his broken HD 428s and I have to recable them because the cable is frayed above the left ear.  I am completely new to recabling and I don't know where to start.  If someone could recomend a place to buy cable that is not to expensive that would be nice.  I also don't know where...