After a few minutes of use the volume goes down and a loud crackling noise comes out of the speaker and when I play my guitar , it all distorted. Recently it shut down altogether except the power light stayed on. The heat sinks in front of the amp reach 165 to 175 degrees F at the terminals while all other connections are 80 to 90 degrees F. Visual inspection of the amp components, does not reveal any bulging or overheated components. Can you help?f
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