I have a question concerning my setup. I run a 5150 II head through a krank rev jr. 1x12 cabinet. I've read that the cabinet can handle up to 100 watts (5150 is 120 watts). I don't ever run the head's volume about a 1.5. Is this in any way bad for the head (or the cab for that matter)? Also, on a potentially related note, I started getting a washy sort of noise that happens when I turn it on, and also repeats every 10 seconds or so, but only on the distortion channel. Could this be related to my setup? Thanks