

I bought a house that has ceiling speakers in several rooms and it looks like this is the single hookup to play music to all of the speakers. Each room has its own volume control on the wall. Before deciding if I need to replace all of the speakers, I would like to purchase an amplifier to test the speakers. Any thoughts on the best amplifier/device to hook up to this system?
Would something like the below work?
I have also attached a picture of the back of one of the speakers. They are old.