Well presenting pair of AR1Ws. These have the dampened and ribbed woofers. Binding posts and internal wiring has been upgraded/updated. Speaker cloth could be better installed. There is the name and date of a the upgrade and possibly some work on the spider??? Previous owner installed wire mesh to protect the drivers and also added spiked feet to both. I acquired them in a bundle of audio but I did play them and confirmed that they work. I’ll do my best to answer any questions. I’m in the Oklahoma City Metro. The Acoustic Research Model AR-1W Speakers.