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"I received my recordings in the mail yesterday. To say I am pleased with the end result would be an understatement. The original recording has been in it's original paper sleeve and stuffed into a trunk for years. As it's a 78rpm recording and I have no player for that speed recording, I could not listen to it beforehand. When I received the ..."

Phase inverter

An amplifier that provides an output which is 180 degrees out of phase with its input, or an amplifier that provides a pair of output voltages which are also 180 degrees out of phase with each other.