The humidity can have a very significant effect on the sound of speakers, particularly those that utilize cone material that can absorb moisture, such as uncoated or untreated paper cones. A friend of mine help set up a system for the CES show in Las Vegas. The day the system was set up was a typical, low humidity day in Vegas, the next day a rain storm blew in. The sound totally changed (for the worse) and he and his cohorts had to scramble to make component changes to compensate.
In other respects, high humidity will adversely affect the life of components--particularly with resepct to corrosion. For some speakers, this is a big problem. Martin Logan electrostatics, for example, are extremely reliable and damage proof, except where high humidity causes the leads to the panels to corrode and fail. This happened to a friend who stored a pair in a somewhat humid garage and he found out that it is common in countries with high humidity.
In other respects, high humidity will adversely affect the life of components--particularly with resepct to corrosion. For some speakers, this is a big problem. Martin Logan electrostatics, for example, are extremely reliable and damage proof, except where high humidity causes the leads to the panels to corrode and fail. This happened to a friend who stored a pair in a somewhat humid garage and he found out that it is common in countries with high humidity.