thomann fun generation Stagemix 400 User Manual page 16

Connections and controls
1 [PEAK]
Status LED. The LED flashes if the signal of the microphone input is overloaded.
2 [MIC]
Microphone input, designed as XLR input socket, 3-pin
3 [LINE]
Line input, designed as 1/4" phone socket
4 [TREBLE]
Rotary control for adjusting the high frequencies of the respective channel
5 [BASS]
Rotary control for adjusting the low frequencies of the respective channel
6 [EFFECT]
Rotary control for adjusting the signal portion, which is sent to the internal effects section
7 [VOLUME]
Rotary control for adjusting the volume of the respective channel
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PA system