Hi, I have had my HD Pro for about a year now. I love the device, but recently I have had an issue where when I power the unit on after a few hours away from the device, the signal sounds as if it is not up to normal volume. I turn it off and on again the signal is back to "normal". The best example I can give is when using my guitar channel the distortion sounds weak, I turn it off and back on the same channel now sounds full again. When I use my bass with active electronics, the signal sounded as if the battery was dead. I turn it off and on again and using the same battery the signal is back to normal. WTH is going on here? Any one know? I am sorry this is so vague but if you have any answers I would appreciate it. Thanks!