Re: Water damage... causes
I bit off point, both the wet hands and shuttle tile are examples of thermal resistance when in physical contact (wet hands lower resistance, tile high resistance) which to ambient air will be similar. The higher thermal mass is why cold metal parts will attract more condensation.
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One point not yet determined is when does the moisture accumulate? Cold speakers brought into a warm venue can attract moisture, that hopefully will dry as the speaker is used and heats up. When packed back into the trailer they will be warmer than ambient so not an issue. Heating and cooling cycles inside the trailer may be the issue as air in the trailer heats faster than the massive metal speaker parts...
I am leaning toward relatively tight road cases for the speakers, with perhaps a light bulb inside to heat/dry.
Of course you know your pattern of usage better than I can guess. If they don't get warm at every gig, they can pick up moisture there.
JR
