I'm on my second Parasound P5 preamp. I am hearing noise\/Hiss while turning the volume up again on this one too. It just started about a month into ownership. Just like my first one. I sent the first one back for repair and they couldn't duplicate it. On to another one once I sold my first and this one does it too. I am guessing it's just a character of this volume pot. It's not audible when the song is loud. When you turn the volume up during a quite intro to a song is when it's noticed most. Not a huge deal again but when I spend this type of money on something, I expect a little higher quality I guess. My Marantz gear has never done anything like this. I believe my new Primaluna HP integrated uses the same Alps volume pot. It's dead silent however. I am not here to bash Parasound at all. Just a little frustrating since it has all the features of a pre amp you could ever want.