Front/Rear view
Low Level Input (CH1/CH2)
High Level Input (CH1/CH2 & CH3/CH4)
Gain Control (CH1/CH2)
High pass switch (CH1/CH2)
High pass cutting adjustment
Input Mode selector
Output Mode selector
Low pass cutting adjustment (CH3/CH4)
Low pass switch (CH3/CH4)
High pass cutting adjustment (CH3/CH4)
High pass switch (CH3/CH4)
Gain Control (CH3/CH4)
Led indicator
Low Level Input (CH3/CH4)
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