An original AR 3/4 inch, ferro fluid cooled, soft dome highrange tweeter for the original AR 9 Series speakers in perfect used condition. These have become exceptionally difficult to locate. It is a 4 ohm part. My experience tells me that if you are to have a failure, it will likely be the tweeter. You can also find our replacement dispersion ring in this Dept. The AR-9 Tweeter had two production variations with this silver ring. One had the smaller diameter surrounding the dome. The second was a similar silver ring but of larger diameter and closer to the outer edge. The performance is identical. These drivers has been tested with test equipment and a music source and is guaranteed to meet the original specifications. If you would like to be advised of new and exceptional items along with our sales, please sign up for our Newsletter. The item “ACOUSTIC RESEARCH AR 9, AR 90, AR 91, AR92 ORIGINAL TWEETER-SMALL SILVER RING” is in sale since Monday, October 30, 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.