Sennheiser HME 110 Instruction Manual page 33

Using the HME 110
Adjusting the microphone gain "Mic Gain"
According to JTSO approval C58a, the microphone output
voltage is factory preset to 400 mV. If the microphone output
voltage is too high or too low for your audio system, it can be
readjusted on the microphone.
Use a small slotted screwdriver and turn the "Mic Gain
Adjustment" screw (see diagram) until you have reached
the desired setting.
Mic Gain Adjustment
+
–
BKE
45–1
P/N 045–305–097
TSO - C58a
MADE IN GERMANY
HME 110 | 11