Cabinets are in very good condition for their age. Woofers seem to have been replaced with Vifa Denmark. Don’t know if that what AR used but they have 4 screw holes and the speakers have 6. These were an Estate Sale find. They were playing in the home during the sale and sounded fine. No other testing was done. I added some teak oil if they seem a bit shiney. I ALSO LISTED A PAIR OF AR-4x SPEAKERS (ID- 257089924308).