I keep me and my band mates valvekings in a basement where we practice and they remain there 24/7. Now I wouldn't describe the basement as "humid" but the far wall does allow a small amount of rain water to enter the basement when it rains heavily. Usually a small section of the concrete near the wall will remain wet there for a day or so and then disappear. Is this basement a bad place for my amplifiers to be located? I have kept my amps down there for personal practice since I started playing 8 years ago and my dad practiced in the same basement when he was in bands 25-35 years ago. We have never had any problems with our amps but I have never had any tube amps down there personally. Should I get a dehumidifier for the basement? Any advice/suggestions?