Using Headphones
Headphones allow you to enjoy playing at night without worrying about your surroundings. Turn down the volume on the Digital Piano before connecting headphones.

Headphone Mode
When using headphones, this reproduces the natural sound that reaches your ears when you play an acoustic piano.
For more information, see “Headphone Mode”.
Sound from Speakers While Headphones are Connected
When the [Speaker Out] setting is set to <On>, sound will come out of the speakers even if a plug is inserted into the PHONES jacks.
For more information, see “Speaker Out”.