Instruct: Classify Amazon reviews into positive or negative sentiment
Query: these stands bite the big one

They are designed to wear out by becoming loose at the base. Unfortunately I speeded-up the process by pushing down on them to straighten the speaker. Tightening the screws at the bottom doesn't make any difference. Welding or Gorilla-glueing seem to be the only options. Who ever heard of planned obsolescence for speaker stands? Now you do.