Kenwood KDC-X997 Manual page 25

Resetting of DTA Settings
You can reset the DTA-compensated values to the factory settings.
1. Press [SRC] and select a source other than Standby ("STANDBY") using [Control] knob.
2. Press [Control] knob.
Enters the Function setting mode.
3. Select "Audio Control"
knob.
4. Select "YES" using [Control] knob.
Exiting from the Function setting mode
Press and hold [1/6].
> "Pro Setup" > "DTA Settings" > "Reset DTA Setting" using [Control]