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RE: If you're referring to the 'double insulated' designation that allows manufacturers of small

>> If you're referring to the 'double insulated' designation that allows manufacturers of small appliances, hand power tools, etc. to use a two-prong power cord, there may well be a cost issue involved, but there may also be other considerations. From what little I know of the subject (mainly observation) these devices often use a non-metallic (nylon, plastic, etc.) case as part of the 'double insulation' process, so perhaps increased RFI would be a potential drawback for audio playback electronics. Though I suppose a work-around could be found...<<
>>>>>>>>>>>>>>>>>>>>>>

Actually most Cd and DVD players do not use the safety equipment ground. The AC power wiring is double insulated. The case is floating.... And the case is made of a conductive metal material to reject RFI.

A Faraday cage does not need to be grounded to reject RFI.

Also more and more manufactures of A/V equipment are going to the two wire power cord. Less ground loop hum problems and complaints.
Marantz is a good example of one.




Edits: 08/25/08 08/25/08
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