Audio Amplifier
SIP12 +------+ ++ 12| OUT-A | 11| BS-A | 10| Vcc | 9| BS-B | 8| OUT-B | 7| GND-OUT | 6| GND-IN | 5| IN-b | 4| NFB-B | 3| BYPASS | 2| NFB-A ++ 1| IN-A +------+
No frequency to check
MB3722 Datasheet