Re: Water damage... causes
Yes, they do sit in a box truck pretty much year round. That said, I've disassembled other speakers that sat in that same truck for even longer periods of time and I've never seen anything quite like this. Condensation seems unlikely (to me) for this reason but it's a much scarier problem if so.
We haven't pulled the other three cabinets apart to know their fate - though they are working just fine right now. That doesn't mean the corrosion hasn't started on them though, and that this box was just the first to go kaput.
I figure if I pull apart the other boxes and there is no corrosion then I can assume this wasn't condensation related - it was just that this box got really wet somehow (i.e. if corrosion, it would have affected all boxes roughly the same). However, if they are all corroded it doesn't prove anything. It could have been one of our "wet gigs" or condensation over several years.
