The techs ran mine all day on the floor and they never cut out once. Mine arn't mounted on the floor, they are mounted up high touching the ceiling near the dancefloor. The temp at the ceiling easily hits 120'F after a few hours of people dancing.
Your options are to trade them, sell them, or find a way to cool the heatsink. A small 4" computer fan is plenty.
I just may have to do the computer fan. I love the way they sound.
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