I bought an SWR Workingmans 15 about six weeks ago. I got it used for $500. I figured it was a decent price, so I played it in the store for a while and grabbed it. I've noticed a few things in recent days - after playing it almost every day since - and I'm curious what you think. The past few times I've turned it on, I get a static noise, which then stops when the amp powers up completely. (It only lasts about three seconds, but it has me concerned.) Also... I don't normally unplug my chord from the amp. I unplug it from my guitar and string it over the amp, so I haven't noticed this problem until now... Well, I unplugged it, and I noticed that the 'barrel' of the jack that goes inside the amp seems to move up and down. It's got a lot of 'play' to it, if you know what I mean. I can plug the jack in, and then move it around if I wanted to. (Why I would want to, I have no idea. I'm just trying to describe it.) I'm starting to get the feeling someone has been inside this amp. Like maybe it had problems, someone hacked around inside it, and then traded it in when the problems didn't go away. I'm not sure. What do you think of the static noise when I turn it on? What about the loose jack? Are they related? Any reason why these things might be happening? Thanks for your expertise.