Hello. I own this Marantz which I purchased new in 2013 and have had very little trouble since then; however, that all changed a few days ago when I noticed that my left surround speaker (channel) had dropped way low in volume. So I ran the Audyssey program again, after doing a receiver re-set, thinking that some glitch had occurred which I was hoping would be corrected by the reset. After running the Audyssey again and checking levels afterward, I noticed that the left surround level had been set at +9.5, where all other levels were set at - (negative db) where they have always been before. Well, that setting brought the audio level back up to where it balanced with the other speakers, BUT the level of that channel was almost "maxed out, " which concerned me. Then I ran Audyssey again, just to make sure that setting was correct and, while there was a little variation in the other channel's settings, the left surround channel had been set at +11, which totally maxed out that channel's available volume. So now, my question is...is this an amplifier or a processor problem? Either way, I'm told, my a friend who used to repair these receivers that Marantz probably wouldn't have any parts needed to make any repairs, so is my receiver headed for the junk pile or what? Any help or advice would be greatly appreciated. Thanks and BTW, there is nothing wrong with the surround speaker itself, since it was playing the "pink noise" OK.