Taramps bass 1200 2 ohm

Do anyone know the marking of ic 1, next to the negative terminal?
 

Attachments

  • IMG_20211019_205645__01.jpg
    IMG_20211019_205645__01.jpg
    439.6 KB · Views: 77
  • IMG_20211019_205535.jpg
    IMG_20211019_205535.jpg
    993.3 KB · Views: 73