Guys, I recently picked up an integrated Marantz and it sounds great--save for the fact that plugging in a pair of headphones results in some fairly noticeable static and perhaps even some faint humming that won't change despite any volume adjustment. To be clear, there's some faint static that's heard through my speakers as well, although it's my understanding that this is quite normal. I've tried cleaning the jack with some contact cleaner and lube and I've already gone through every other pot and switch I could find. Additionally, this particular model has pre-out/main-in jacks in the back. I noticed removing the jumpers does away with any sound completely (including the static). Of course, I went and cleaned these up as well. No dice. Am I right to assume that the fault lies in the transistors? If so, why is it that the speakers sound just fine? Any insight would be greatly appreciated. I also wanted to throw in there that my 2215b sounds just fine through my headphones. Thank you.