The BL4CK DI4MOND Limited Edition Coaxial Speakers deliver class, sophistication, and power. This series sets itself apart by using the highest quality control and raw materials available for its high-end technology. Woofers resound vigorously through the paper cones together all the vibrant low frequencies while the mid ranges and high frequencies showcase Mylar tweeters. These speakers come in 4 ohm impedance.