Hi! I just received a Vox AC30c2, and let me say that the amp sounds really good, but... ... he kind "hisses" a quite bit. Even with nothing plugged he does a strage "waterfall" noise, that goes worst when the "tone cut" knob goes on the trebly side. It's really worst in the "Top Boost" channel then in the normal channel. I made a video: http://www.youtube.com/watch?v=tHfR938F0o8&context=C35fe14bADOEgsToPDskKhVjGwdfBKJbCw53wbfyT8 I would like to hear specially from AC30c2 owners. Does your AC30c2 makes this noise too? Is it normal, or my amp is broken? Thanks in advance.