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Well, after getting the other 370 I have up and running tonight, it seems to have the same hum. I haven't done any in depth testing nor have I moved the transformer around yet, but just listening while working the sliders it seems pretty similar. With all the EQ sliders at midpoint, it's fine. I notice this amp has more shot noise than the other when you turn it up with no input, but I haven't changed any caps in this amp yet nor have I changed the couple of high value resistors to metal films as I did with the 1st amp. I'll be curious to see if those things make a difference with this amp.
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