Well, now I have bigger problems.
I've been enjoying the system tremendously for the last couple of months, but last night I started getting a screeching and scratching sound from all of my speakers. As far as I can tell so far, it's definitely the 970. I'm going to swap in another pre-amp later to make sure.

It sounds like the same type of issue mentioned in other threads. I think it turned out to be a capacitor? I know working in IT, we've had a rash of certain model PCs die because the manufacturer got a bad batch of capacitors. It was a service nightmare.