I looked up the Anthem Preamps and it looks as if they all have a loop through or unity gain so an external processor can be add and control the volume. As long as your intergrated A/V pro has either a line level output or you are using an A/V processor with seperate amps you should be fine. This would be easier if you include the MODEL numbers of all your equipment so manuals can be looked at.
How to merge my 2 Channel and HT Systems?
OK, I have downsized to a smaller condo and no longer have the luxury of a dedicated music system in one room and a full HT setup in another. I really would like to keep at least my Plinius SA 102 to power my Joseph Audio RM25si's for music (Thorens turntable, Theta Miles CD player, and maybe FLAC streamed over network) while using my preamp (Anthem) for both and power amp (B&K) to power the rest of the system when listening to HT. Is it possible to merge my two systems so the Plinius drives the Joseph Audio's for music and HT and the rest of the system kicks in for HT?