I just bought a used Adcom 555 but it will not have an instruction manual. The 555 manual at the adcom website is just a spec sheet. What do you use to connect an amp to your receiver (acting as a preamp). Standard interconnects? Speaker wire? Then, is the idea that you unhook whichever speakers you are intending to amplify and hook them up to the amp? Once you do that, do you just turn it on and adjust your levels? Is it as simple as that?