Brand new sealed The Dayton Audio ND105-4 4" Aluminum Cone Midbass Driver is a high-quality audio component designed for home speakers and subwoofers. With its 4 ohm impedance and 4-inch driver size, this speaker delivers clear and powerful sound for a variety of audio setups. The Dayton Audio brand is known for producing reliable and durable audio products, making this midbass driver a great choice for enhancing your home audio experience.