^^^ thats funny bc zapcos older amps were arguably the best of their time. I havent actually heard the newer ones but a lot of people compete with them so they must do something right.
As for wiring, id go to knukoncepts.com. all my stuff is from them. Good quality and great prices. The 4600 has a front, rear and sub rca output so you would need some y-cable rcas to turn 1 channel into 2. Or look into an audio control unit maybe? im not too farmiliar with them off top of my head. They may have like a 2 ch in 4 channel out unit or something. again im not very familiar with them so hopefully someone else knows more than me.
I ordered my home a/v receiver from techronics and the hdmi out was jacked up so i sent it back and took a couple weeks for me to get it back. That ones been in use for the past 3 years. coincidence or not, thats the only experience i have with them.