60 disc carousel. Good sound when not playing MP3

Loud line noise coming through speakers when MP3 decoder is being used. It can be heard during disc access and during MP3 playback. I have tried this unit as well as the one without the 5.1 speakers, and have used different MP3s on different discs, at different bit rates and ripped from different computers

Poor Interior Shielding provides quite a bit of line noise during MP3 playback.

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Same problem with lower model number that does not provide 5.1 Dolby