Audio ICs
Pin No. Pin name Pin voltage
19
HPFL3
22
HPFR3
VCC/2
Equivalent circuit
VCC
GND
VCC
42k
20k 20k
50
ALCR
−
48k
GND
VCC
23
BASS1
25
BASS3
VCC/2
GND
24
BASS2
26
BASS4
VCC/2
VCC
GND
VCC
27
BASS5
VCC/2
GND
BH3874AKS2
Pin description
A pin for setting cut-off frequency
of HPF.
A pin for setting threshold to set
the ALC.
A pin for setting Dynamic bass
(Biamp) frequency characteristic.
A pin for setting Dynamic bass
(Biamp) frequency characteristic.
A pin for outputting Biamp.