Vintage Acoustic Research AR8S HiFi Bookshelf Speakers – Tested – Read Description. Up for sale is a pair of vintage AR8S HiFi bookshelf speakers from Acoustic Research. These have been tested and are in good used condition overall. One speaker: woofer works, but tweeter is not functioning. Other speaker: both woofer and tweeter work properly. Speaker covers have some small pinholes (see photos). ? Photos : The pictures shown are of the actual item you will receive. Please review all images carefully – they are part of the description. If you have any concerns or would like additional photos or information, feel free to reach out. I’m happy to help! Thanks for looking – and have a great day!