MUTE_MIC1
LEVEL
ENC IN
LEVEL
MUTE_ALL
MIC1
LEVEL
MIC2
LEVEL
MUTE_MIC1
MIC3
LEVEL
MIC4
Q2
AUX1
AUX2
GND
MP3/BT MODLE
BASS TREBLE
LEVEL
2-STAGE EQ
Q1
GND
Switchover between 4-16Ω and 100V
DC 24V inverter
power supply
MUTE_ALL
AUDIO OUT
Protection circuit
Amplifier output
Amplifier
module
LED display
Fun control
switching
power supply