These Acoustic Research Bookshelf Stereo Speakers are a great addition to any home audio setup. With a sleek black color and rectangular shape, they fit seamlessly into any room. The speakers have a 2.0 channel wired connectivity configuration and are designed to be used as front right and left speakers. The brand, Acoustic Research, is known for its high-quality audio equipment and the model, AR 215PSB, is no exception. These speakers are new old stock (NOS) or new open box (NOB), so they have not been used but may be missing the original packaging.