I was listening to music last night when I heard a loud pop & the sound became harsh and grainy. When I turned the volume down, the there’s a fairly loud hiss in the right channel. Tried listening with headphones, with headphones, I get nothing at all from the right channel which would seem to indicate the problem is with the SGC, not my M700 amps. Any attempt to power up again results in another loud pop. If anyone else has experienced this and found a solution I’d appreciate your feedback. I did email customer service last night and received a response this morning with several questions, which I promptly answered by email but haven’t received a reply, which I assume won’t come until Monday at the earliest now.