Wayne Parham Messages: 18787 Registered: January 2001
Illuminati (33rd Degree)
If the speaker cone warps, it may cause the voice coil to rub. Length of time until you can expect to see damage depends on cone material, amount of humidity and duration of exposure. Some humidity is desirable, and if the length of drying time between high-humidity exposures is high, it might actually be a good thing. But if the cone paper begins to shrink or warp from these humidity cycles, then you have a problem.