ive got a sharp cd x12 from 1991.ok,so the problem is this....the plastic speaker connectors on the back....one side makes a good connection while the other side doesnt....been inside it and theres nothing wrong....no broken solder joints,the area is nice and clean,the speaker itself works well when run on the other connector so the speaker is fine,the balance is fine (checked on headphones lol)and the spectrum analiser is balanced and reading out fine....so the am is fine on both channels....tried cleaning the connectors inside and out and still nothing....im losing my rag with it so does anyone have a clue about it???? its a lovely box and never wanted one to work properly as much as this