Zoom H6 Operation Manual page 211

Lowering the line output level
You can lower the output level of the LINE OUT jack. Use this when the output signal of the LINE OUT jack is input to the external mic
input jack of an SLR camera or another connector with high input gain.
1.
Press
2.
Use to select
"INPUT&OUTPUT" and
press
3.
Use to select "Line
Out Level" and press
4.
Use to set the output
level of the LINE OUT jack
and press
NOTE
This setting does not affect the output level of the PHONE jack.
H6
Handy Recorder
03