When I first bought this house, I remember the previous owner mentioned a speaker system installed all over the house. They also mentioned that it wasn’t working anymore; however, they did point us to where the control center is for said system if we would like to look into repairing/installing it. Would anyone have any idea as to where I should start if I were to fix this as I would love to have the speaker system in the house finally working instead of sitting idle. I have attached a picture of the control board and a speaker for reference. Any help would be greatly appreciated.