Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good sound, does not hold up in the heat

The sound on these speakers is great, however, after having them installed under the eaves of the roof above our patio, one of the grills started to fall off. Upon closer inspection I noticed that the grills are glued on with some adhesive, and the heat softened it to the point that the grills are loose. I will be returning them.