I have an a5-350 that had the same problem while it was under warranty. It started about 2 weeks after I got it. It took ED FOUR tries to get me a good amp. Its still working - which surprises me after what I went through. No wonder they went belly up! If my amp dies I'll probably just get a pro amp rather than another plate amp. Parts Express has a sale going on with their Bash 300 and 500w amps if you need a plate amp.
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