One, original, AR Tweeter for AR-12 speakers. This was manufactured approximately 1977. Do not confuse this with the tweeter for the AR-11 or AR-10PI, it is not the same. May also be used as a substitute for the AR LST-2 Rear Terminal Tweeter. Initially, we have two available. Removed from a working AR-12 speaker. Fully tested with test equipment and a music source. This is the correct impedance as the LST-2. However, the dome is a little softer. As the LST-2 Tweeter is very hard to locate, this is a nice substitute and blends nicely with the other LST-2 tweeters. We seldom have one of these. You might want to consider one for a long term spare. Suitable drivers for the early model AR speakers are becoming harder to find. Experience tells us that if you are going to have a failure, it will be the tweeter. If your foam seal has deteriorated, new foam gasket tape is available in Dept. OTHER SPEAKER SERVICE PARTS. AR speakers require sealed cabinets to achieve those low bass notes they are famous for. Felt Tweeter Rings are also found in this dept. We usually have over 200 AR items listed. If you would like to be advised of new and exceptional items as well as our sales, please sign up for our Newsletter. The item “ACOUSTIC RESEARCH ORIGINAL AR-12 TWEETER AR-LST-2 SUBSTITUTE” is in sale since Tuesday, November 13, 2018. 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.