Wow,
I haven't heard anyone talk about quadrophonic sound in almost 30 years. Back then the equipment was available but it was expensive. It sounds like you got a lot more for your $$$ than you really need right now but the 970 will let you do almost anything in the audio realm. I had a quad reel to reel machine way back then that was awesome. In order to play it though I had to borrow another friends amp to output four separate channels. I ended up selling it for more than it cost me after a year or so. I actually bought 4 large Advent loudspeakers just for the experience of quad sound.