About 8 months ago i purchased an acme low b-II cab. It was wonderful, i was driving it with half of my stewart 1.2, and it was happy. I was using it for mostly quiet gigs, so it kept up well. Recently I got a second cab for doing louder stuff, b/c one was getting lost in the mix. Now the first cab has developed this horrible buzzing noise when i play, it comes and goes. I have no idea what it is, it seems like it's inside the box... which seems implausible. I'm also kinda disapointed with how they sound with a group. In my living room, they're the best i've ever heard, but a little itty bitty guitar amp buries the acme. Any advice?