I am having some serious issues with my MPulse - I turn it on, there is almost no bass sound coming through (I can hear a faint sound coming out when I play), but mostly just static. The speaker will extend outward, wait a second or two, then go back in. Then I get a very loud pop. I was trying to figure out what section of the amp was malfunctioning, but the effects loop was already not working, so I can't bypass the preamp. Just now I turned it on, with nothing in the input, and not connected to a speaker. There is an intermittent click (about every 5 seconds or so. Upon the first click, the compressor light comes on very brightly, as if there is a very loud signal going into it that it has to compress heavily, then upon the next click, the light goes off. This repeats. Any thoughts on what is happening? I just moved to Baltimore and don't know where to take stuff like this, and if it just sounds like it needs a new preamp tube, I can do that myself.