Initially, we have two available. At the time of this listing we also have the same woofer which is New Old Stock. As reconditioned, this will save you a few dollars. Removed from a damaged cabinet. There were at least 8 variations of the AR 12 inch woofer spanning the time frame 1967 to 1998. Most can be interchanged without significant difference in performance. This woofer can be successfully utilized in any AR speaker with a 12 inch, foam surround woofer including the AR 9 Series, AR-11, AR-10PI, AR-58S, AR-58b and AR-58bx. We have replaced the surround with the correct size and material and dust cover. The voice coil was centered in the process. It has been tested with test equipment and a music source. Don’t short change yourself and try to reuse the old dried sealer or an old foam gasket that has already been compressed. If you have a later model speaker with the foam gasket, we have replacement gaskets in the same Dept. AR speakers rely on a sealed cabinet for those low bass notes. If you would like to be advised of new and exceptional listings as well as our sales, please sign up for our Newsletter. The item “ACOUSTIC RESEARCH ORIGINAL AR-3A, AR9, AR-11, AR-10PI WOOFER- NEW SURROUND” is in sale since Wednesday, December 27, 2017. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Speakers”. The seller is “vintage-ar” and is located in Albany, New York. This item can be shipped worldwide.