This is a complete kit for professionally replacing all surrounds on a pair of AR-90 Speakers, the 4 woofers and 2 lower midranges. Assembled from components selected over the years while replacing the surrounds on many, many AR speaker drivers. This is not a generic surround replacement kit. The components and detailed instructions were selected explicitly for Acoustic Research speaker drivers. This kit was utilized on our own AR-90 Restoration depicted. The AR90 speakers have two 10 inch woofers per cabinet and one 8 inch lower midrange. The lower midrange surround failure is almost always shortly after the woofer failures. All surrounds should be replaced at the same time. Note that the lower midrange utilizes a dust cover somewhat larger than most surround kits. The correct size is provided. The kit includes; a total of six foam surrounds, a set of shims for centering the voice coil (go the extra measure and center the voice coil), one and a half containers of adhesive It is strong, fast drying and dries clear. , three adhesive applicator bottles, six dust caps that you literally drop in place when done and a step-by-step set of instructions specific to the AR-90. If your gasket is torn and not usable, you may find gasket tape in department OTHER SPEAKER SERVICE PARTS. There are two key components ensuring the correct performance; the foam surround must have the correct flexibility and roll diameter. If this is not correct, the stroke of the driver cone will be limited and thus, the bass notes. These surrounds are correct for AR speakers. Additionally, shiming is necessary to guarantee that the voice coil remains centered in the magnetic gap. If you don’t get this right, you run the risk of the voice coil rubbing on the magnet pole piece and causing distortion. We shim every driver we repair. We are very good at this but never take the chance of not shiming and later discovering the rub after all the work has been done. Oh, this AR-90 is not included with the kit! Please browse our entire store. We are continuing to add new items for the AR fan. We have over 200 different items in stock. If you would like to be advised of new and exceptional items as well as our sales, please sign up for our Newsletter. The following is a recent comment from on of our customers. Greetings Larry: Just a quick message to let you know that I successfully completed refurbishing my friend’s beloved speakers this past Saturday. As we had both suspected, the surrounds were shot on both speakers, but more so on the one that I had mentioned was buzzing. The new surrounds cured the problem and we both want to say that the dust cap covers lend a classy finish to the woofer. Needless to say, my friend is VERY pleased with the outcome. I suspect things may not have gone as smoothly if it was not for your kind assistance. Thank you for everything! This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Speakers”. The seller is “vintage-ar” and is located in this country: US. This item can be shipped worldwide.