Not sure if this is a silly idea, but I'm wondering about where or not this is a good idea. I keep an old Vibrolux Reverb at my family's cottage, in the finished basement (it's basically a house), and according to the little portable humidity detector I have, the basement reaches only about 17% humidity (maybe even lower) in the winter months. I know this would not be good enough for most guitars, particularly acoustics, but what about amps? I'm a little worried that the lack of humidity might cause some issues with drying out the speakers or maybe even compromising the structural integrity of the cabinet. Would putting a little home made humidifier (wet sponge in a little snack container with holes punched in the lid) in the back of the cabinet be a good idea? Or are my worries a little unfounded. The amp sounds fantastic and I'd rather not harm it.