Has anyone attempted to configure vintage quad gear for 5.1? I would like to control four surround speakers, a powered subwoofer, and center channel using vintage hardware. At the same time, accept 5.1 source inputs from DVD, etc. It would seem as simple as arranging five discreet amplifier sources (e.g. one quad amp plus a stereo amp), but controlling everything would seem daunting. Thanks in advance for any comments.