I was listening to some music this morning (audioslave if it makes a difference) a little loud, like -12 on my HK8000, when I heard it pop and mute a little (like only 1 channel muted) then came back. I kinda thought I was hearing things because it was so quick (less than 2 seconds). Just a few min later, it popped louder and muted longer - and I sprinted to the receiver to turn it down. By the time I got there, it was back to normal. I turned the volume down a bit, then did a quick heat check, quite cool actually - I've felt it much warmer. So I checked each of the connections, wiggled them a bit to see if maybe something had come loose, and nothing seemed to be wrong... It played for the next 15-20 min without a problem before I headed off to work.

So now I'm at work, been worried all day, and dont have a clue as to whats wrong. Any ideas? I'd love to hear them as I'm at a complete loss!

Thanks!