Why does my stereo spontaneously cross-mixes channels with inversed phase?

Question

There's a strong reverb effect and the vocals are canceled and slightly to the right - seems like a phase shift. But:
- The vocals are canceled even when I hold my ear against one speaker, or when I flip the polarity for one of the speakers.
- I hear both channels in each speaker, and each channel on both speakers.
- With balance full left, the left speaker sounds slightly louder, with full right it sounds centered.
- I tried the two available inputs ("DAT" and "AUX"). Same thing.

I opened up the unit, and as far as I can tell, everything looks fine. Nothing burnt or melted, no excessive dust (and they were smart enough that no board is upright).You can see snapshots at http://www.flickr.com/photos/31278470@N00/sets/72157594269637399/

The unit is a Sony MHC-1600. Its amp is STK4132II. The only thing I did to it was to move it to another room for one night.

How the hell could that have happenned, not to mention how to fix it?!

Answer 1

The wire to one of your speakers has the polarity inverted. Mkae sure the positive leads on your speakers are connected to the positive leads on your receiver.

Answer 2

Can you move it back :-)


My best guess is that it's broken/loose connection.

Do you have any other source where you can test/borrow/test. I am sure that you must have rewired, pressed and inspected the components/cards by now taking care of the static.

Dont see anything should/can go wrong by just moving it.

Good luck.

Answer 3

not precisely yet my spell is obviously engaged on ole Bert. i didn't want him to explode all at one time - i wanted it to be very s l o w and painful. And particular toddler - I do have faith it could ensue through fact i've got considered it on television so it would desire to be so. ?

Answer 4

'cause it sucks. Sorry for the uneducated answer.