iConnectivity AUDIO4c Desktop 4x6 USB Type-C Audio/MIDI Interface - Manual (Page 15)

In the diagram above, channels 1 & 2 have been selected and the gain for both channels has been
increased to 0 Db (maximum output level).
Sound check - Headphones
Signal Level Mode : Touch the region centered around [ Phones ] on the bottom row of the Interactive
Display until the [ Phones ] indicator turns green. A green [ Phones ] LED indicates that the LED
meters are in Signal Level Mode . In this mode the LED meters will display the level of audio being
sent to the [ Phones ] socket on the rear of the AUDIO4c.
In the diagram above, the [ Phones ] output is selected and the audio level to the phones output is
approximately -10 Db.
!!! USE EXTREME CAUTION WHEN ADJUSTING VOLUME TO HEADPHONES !!!
Gain Set Mode : Touch the region centered around [ Phones ] on the bottom row of the Interactive
Display until the [ Phones ] indicator turns red. A red [ Phones ] LED indicates that the LED meters are
in Gain Set Mode . In this mode, you can use the rotary encoder to the right of the Interactive Display
to adjust the level of output to the Phones socket. The LED meters will display the level of audio
being sent to the Pditedhones socket on the rear of the AUDIO4c. Turn the rotary encoder clockwise
to increase the gain level of the headphones output. Turn the rotary encoder counterclockwise to
decrease the gain of the Phones output.
AUDIO4c User Guide v2021-0002 Page 8