Sounds like your amp is either under-designed for Class A operation ( not enough heat sink area ) and / or your installation lacks enough airflow to allow the natural convection of heat to flow away from the amp. If the amp hasn't got at least 12" of open space above it with nothing surrounding it on the sides, you are bound to have problems. You either need to address that situation and / or install some type of forced air system to help keep the amp cool enough to keep operating. Sean
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