Thanks to all that have responded with guidance. I would like to ask another question, but I guess I need to describe my set up first. I will start off with my primary avr the denon x 5200w, that directly supply the following speakers, center polk csi3, the surround back polk rti8s, wides rti8's, height polk rti6. From there following the 5200 set up menu, I have used the rca outs to the first (slave amp, for lack of proper word to describe this procedure), denon 5800 which powers 4 rti12's for left and right channel. I could not find a amp assign on the 5800 to bi am so I just used the left channels that had power to bi wire them as well. I then went from the surround left and right to a second slave amp denon 3808 ci{ craiglist buy] and bi amped and bi wired polk rti 8's as well. My tops I also slave amp a bi-amp mod mode Yamaha 2065v which power mc 80's. the subs I use is the svs ps1000, on one side and the second channel I have a fry's special jbl 150 watt special. So here is the question, what input terminals and mode should I set the slave amps to, like phono, cd, dvd, vcd, ect. I am not sure which one is the best inputs I should use for slave amps for the best sound, by bypassing any of their internal processing for what I am trying to accomplish. Also, how much improvement would I see using high end rca wires? Sorry about the double post. I logged out.