Tieline VIA User Manual page 8

Step 5 (cont). You Are Ready To Go!
Now with the External speaker (BOSE)
turned on, slowly increase the volume
knobs on the speaker until you have
reached a comfortable level. warning, if
too high you will get feedback from the mics
when speaking. Good levels will be when
the activity led's are only clipping into the
orange occasionally.
Before transmitting you can try your mics
and headphones in 1, 2 or 3 inputs as well,
by selecting 1, 2 or 3 input buttons and
adjusting your volume level in the
headphones by turning the green dials 1, 2
or 3 to adjust.
Just adjust the levels whilst talking at a normal level, and
turning the green knob associated with the channel you
are on to set a comfortable listening level.