A civilian writes a test:”Possibly the best pre-amp one can have.”

"“Your Parasound amp is fixed,” said Charlie in his usual calm voice.
“Oh great, what was the problem?” I asked
“Nothing,” He said.
“Nothing?” I asked
“It was just its heat sink that had come off, so I attached it back and it stopped heating up. It won’t shut off by itself now,” Charlie replied.
“I see, thank you,” I said, looking at him with a praising smile. Even though I am technically handy, I had not been able to figure out why my amp was shutting itself off
."

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