Article ID : S1Q0094 / Last Modified : 09/23/2005Print

Poor Audio Quality or Cord Problems

    Dear Valued Sony Customer:

    It has come to our attention that some customers using the MDR-NC50 noise canceling headphones might experience poor audio quality including mono sound (sound from one side) or a howling noise. The headphone cord may easily fall out of the headphone jack.

    Cause: The headphone plug has not been inserted all the way into the headphone jack.

    Solution: There is a line on the plug which should almost disappear when the plug is inserted all the way into the jack. A loud click should be heard when inserted correctly.

    Please refer to the pictures below.

    MDR-NC50 Plug

    The plug must be inserted up to this line.

    The cord should be firmly inserted up to the marked line resulting in a loud and clear click.

    MDR-NC50 Plug Incorrect MDR-NC50 Plug Correct


    The plug is not completely inserted in the jack. The line does not meet the headphone jack.


    The line is right up to the headphone jack.