This ADS L500 Tweeter has been tested and is working perfectly. It is a vintage piece of audio equipment made in the United States, featuring the ADS Speaker technology. The brand is A/D/S/ and the model is L500. This tweeter is a great addition to any vintage audio system and is sure to provide high-quality sound. It has been categorized under Consumer Electronics, Vintage Electronics, Vintage Audio & Video, and Vintage Speakers. Get your hands on this rare piece of audio history today!