The two foremost enemies of most all electronic equipment is moisture and excessive heat.

Carrying an amp into an indoor gig during a a light sprinkle disabled one of my amps once. One of my older keyboards just quit on a really humid night during an outdoor pool party. And, on another occasion, a sudden downpour caused me to scramble to get the equipment under cover and I thought all was well. A few days later, one of my speakers quit and the tech who fixed it said it was caused by a drop of water that corroded a thin metal piece that surrounded the magnet.

I still do some outdoor jobs, but take every precaution to be under some kind of cover and out of direct sunlight on the really hot days.

So...what's that? Three problems in 36 years? Not too bad...but I don't want there to be a fourth.

Eddie