marce - I agree that well designed commercial products may have some filters in them (for emi egress compliance, although there may be emc immunity requirements of some sort).
My point is why is there a need to add filtering - mains harmonics and noise and powerline signals would only get through a poorly designed amp to become audible. If the amp has a sore, then fix the sore.
My point is why is there a need to add filtering - mains harmonics and noise and powerline signals would only get through a poorly designed amp to become audible. If the amp has a sore, then fix the sore.
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