I don't know much about using separates instead of a receiver but I know that to use a receiver as a Pre/Pro with a different amp it needs pre-outs. The VR-509 doesn't, but I was wondering is the other way around possible? If I ever go separates (I just wanna know, I have other more important things I would upgrade first) but is using my existing receiver as the amp and connecting a Pre/Pro to it's 6ch input at all possible or is the connection between the output of a Pre/Pro to an Amp a different format? I know quality wise if I am to use a Kenwood VR-509 as the amp it probably defeats the purpose of going separate but I just wanna know if it would be doable to make it less expensive as I could buy an Amp later. The reason I'm asking this is I was analysing my future upgrade plans and putting down a list of all the components I have and deciding what would justify an upgrade and I figured that the Kenwood VR-509 is very good and if I ever wanna upgrade I might as well go separates so I was wondering if there was a way to split the expense in buying the Pre/Pro first and the amp later.