HI all. I've had an Ampeg BA-110 amplifier I use for personal practice. I have had it for a little less than a year, and frankly haven't used it quite as much as I probably should (what I mean is it gets used probably on average once a week). I've noticed over the last month or so that a crackling sound has been coming from the amp. It isn't a constant sound...I usually only hear it when I hit a lower bass note particularly hard. It sounds like distortion of some kind. It doesn't happen all the time, but it's been consistent enough over the past couple weeks that I'm worried. It happens with both of my two bass guitars, and doesn't matter what cable I'm using. Anyone have suggestions what I should do? Thanks in advance.