A week ago I purchased a GK mb 212II combo from zzounds. It was raining as soon as it was delivered. Luckily someone was home to bring it in. The box was in bad shape already. I opened it and left the plastic on it until I could try it out. A couple of days ago I noticed a small hole on the side of the amp that was about the size of a screw hole with a dent slightly above it. Well the box was essentially trash as soon as the amp was removed from it. I finally got a chance to plug it in this morning and the speakers are rattling with each bass I tried. I called zzounds and luckily I can still send it back and they will send me a new one. It's still a shame because other than that rattle, it really gave life to my musicman SUB USA bass.