Q4: What are causes of and measures to prevent cable breakage?

A: There are several factors that lead to cable breakage, and each cable maker is racking its brains to formulate countermeasures. The most frequent cause of cable breakage is a one-time application of excessive force that causes breakage near base of the connector plug.

A layer of resin has been applied to the protective coating of the cable at the base of the plug as a countermeasure to make breakage more difficult to occur. However, if excessive force is applied, slippage between the cable and the protective shield may occur, resulting in the application of force to the fixed portion of the core wire material within the cable. To prevent the wire material from becoming cut in such cases, we have taken measures to insert Kevlar and other material resistant to forceful jerking into the core of the cable material, but this does not provide complete protection.

Other conceivable measures to increase force resistance of the cable would result in an unwieldy connector that would be too large to be suitable for use this product. For that reason, the most realistic approach is to advise users to take caution not to apply excessive force that could cause breakage of the cable.



Examples of measures to prevent cable breakage:

- Take care to ensure that excessive force will not be applied to the cable when placing the product for use in a bag or pocket.

- Placing the product in a bag containing books and other materials may result in excessive force being applied to the cable without the awareness of the user, so please place the product in one of the bag's pockets.

- Do not wrap the product with audio players, etc. during storage.

- Make all efforts to place the earphones in the earphone case for storage.