A:AnswerYou can't turn off the blue tooth of these speakers. If you know a thing or two about electronics, you can disable it by taking it apart but that would void the warranty. I would just ban cell phones in class and write up students that are using your stuff without your permission to be honest.
A:AnswerSounds like an electrical issue wherever you are plugging this in. Ive had similar issues with other speakers when the wiring in the house is poor or not properly grounded. Are you using a surge protector that's properly grounded?
A:AnswerIf you have a windows based computer, check the setting of your computer. Make sure to have the setting that allows the external speakers to turn the computer on, is turned off.
A:AnswerThe "stands" on each of the speakers appear to be removeable and re-attached in such a way as to allow wall=mounting, but I haven't tried. I use them "as-is" on a bookcase.
A:AnswerThe Promedias tend to emphasize the midrange more. Because of the horn tweeter design and its narrow dispersion pattern, the highs in particular depend greatly on the placement (angle and height). Once you tweak with the placement, the response is well balanced. The bass is slightly on the boomy side, but the subwoofer levels can be independently controlled. For bass in general, room placement can greatly affect how it sounds.
