I bought a used (1 or 2 year old) MAS 1-8 speaker from a fellow TB'er a few months ago. The speaker sounded amazing with my Clarus and plywood DB, but had a noticeable rattle or buzz on the low notes- like something vibrating inside the cabinet that I couldn't figure out. I called MAS, and a gentleman there told me that the vibration happens sometimes, and to send it in, and Mike would fix it for free. I thought, wow, that is great customer service, and I sent it in. I called Mike, and he said he'd get to it in a few days, no problem. That was about 2 months ago. I've had a few communications with Mike since then, in which he has said basically "sorry, I'm incredibly busy, but I'll get to to within a few days". Then nothing happens. Two weeks ago, he returned my call and said it was on his workbench, and he'd have it done soon. Still nothing. I'm trying to be patient, and I really appreciate Mike's willingness to fix this at no cost. It's an amazing speaker, and I have had several gigs I would have loved to have used it on. In the last few days, I've left phone and email messages, and had no response. I'm at a loss as what to do now. Any suggestions?