Yes , it is possible to assign the Mix In signal to the Phones Output only in the TD-10.

1. Press SETUP.

2. Press F3 [CTRL]

3. Press F4 [OPTION]

4. Press CURSOR Up or Down to select "Master" which is next to "Mix In Output."

5. Turn the VALUE dial to select "Phones Only."

6. Press KIT (the new setting is automatically stored into memory).

Note: This setting is global and will be applied to all of the drum kits.