Plinius sa250 overheating


my sa250 mkiv is overheating when run in class a for about two hours at which time it shuts down. runs great in ab mode. the amp has been serviced by a plinius authorized tech with some improvement. has anyone else had similar problems or have any suggestions?
danderson

Showing 2 responses by sean

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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Linnlp12: It's possible that the Shunyata was able to deliver a higher level of current to your amp on a faster basis than your original cord was capable of. Due to the huge demands that in-rush current places on the AC system, blowing the fuses might have been a sign that you've actually got a power cord that can more than keep up with the demands of your amp. This is one of the advantages of going to a low inductance design. Sean
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