I recently purchaced the Rotel 1095 amp to pair with my Denon 3801 as a pre amp. Well now my speakers buzz & hiss and the Rotel has a low level hum when I put my ear to it. OK fine, I plug into another outlet in another room and the speaker noise is gone but the amp hum is still there. OK I move the amp to yet another room and the amp hum is gone and so is the speaker buzz! I have concluded that my house wiring is the culprit but why? This really has me stumped because when doing the tests in other rooms, the only thing connected to the amp was one speaker so its not noise comming from other components. Also I have unplugged all household appliances when doing the test. The main service panel neutral goes back to the street and is also connected securely to my copper water main. Any experience with this kind of problem would be appreciated.