Hi, I just was given these from a family member. I think they are all original, although someone told me the it looks like the woofers where replaced. I didn't know anything about Acoustic Research until I received these AR 10tt. This is the same model in the ad that was shared earlier. I am looking forward to listening the these beauties. In the pictures I posted one speaker is number 42 and the other one is number 52. I don't know if any thing needs changing, repairing, or if any maintenance needs to be done The screws could be cleaned up and the fuses in the back look pretty old.
