So lately ive noticed that my amp will hiss the first few notes from the.bass after sitting all day and then clicked on. The volume is a touch low with the hissy notes but goes away within 4 or 5 seconds and volume and clarity is back to normal. It doesnt come back at all unless I shut it off for the night and come back to it the next day. Its a Carvin R1000. Should I be worried? It works fine other then that. But this amp has sat for probably a year before I got it. I did have to replace the output jack to the cab. But the repair was solid and its been going strong for about a month before this. Just makes me a little worried something is wrong.