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31st May 2007, 06:02 PM
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diyAudio Member
Join Date: Mar 2007
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hum in harmon kardon pm665
When I engage the Bass Contour or loudness contour switch the unit hums in both channels, even with the volume all the way down.
When the Loudness is off unit does not hum, even at full volume. This amp has special Harmon Kardon Phase Correction Loudness. Is there an area on this high power integrated amp I need to look. Perhaps the part of the power supply that the loudness circuit gets its juice from? |
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