Hi TB tube amp gurus! I need your help once more. This weekend I ran into a problem with a tube amp. I connected it to my RoadReady, and played through my Sterling5. Anyhow, on an open E, I heard a sound that was as if the speakers were spitting. And it only happens on the onset of the note and the end of the note, the middle of the note is perfectly alright. So in your opinion, what do you think is wrong? I'm inclined to think that it's not the speakers, since I switched to a different amp to try, and it handled more volume easily. If it is indeed the amp's fault, would these things more likely be a preamp problem or a power amp problem? How would I check?