Hi I have had a Denon 3805 for about 10 months and today I noticed a hum coming from one of my speakers. I was pretty close to the speaker, which is why I noticed it. The hum (or buzz) is easily audible with my ear right next to the speaker but is barely audible from about a metre away. All four speakers connected to the receiver exhibit the same hum but the pair of Monitor Audio S1's connected through a power amp to the centre channel pre-out do not hum. The noise is very siimilar to the noise produced by the receiver itself. I couldn't say for certain that the noise hasn't always been there but I listened to my brother-in-law's 3805 and his is dead silent. I do have quite a few components connected but I tried the receiver with all the other equipment disconnected from the mains and the hum was just the same. Is this typical of a Denon 3805 and did my brother-in-law just get a good one or is my receiver at fault? D.