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Mixer
Start > Settings > Control Panel > Mixer
The MX9 has a speaker and a microphone. They are active when a headset is not connected to the device. The micro-
phone is located to the left of the oval logo at the top of the unit. The speaker (audio) is located above the keypad.
Use the settings on these panels to adjust the volume, record gain and sidetone for microphone input, speaker and speaker
output. Headsets can be enabled, disabled and selected using these panels.
Output Panel
Tap and hold the Output sliders and move them either left or right, or tap the left and right arrows, to adjust Speaker
volume decibel level. Tap the drop down list arrow to select the type of headset currently attached to the unit. This will
load a predetermined limit value; the headphone setting cannot exceed the predetermined values.
Setting Default
Output
Speaker Volume 0 dB
Headset Volume -13.5dB
Headset Selection Default
Input
Input Selection None
Record Gain 0 dB
Record Boost +12 dB
Sidetone 0 dB