The Onkyo SKS-11 package consists of a centre speaker and a pair of rear satellites designed for the Onkyo HTX-22HD, converting it from a 2.1 to a full 5.1 channel surround sound system. Just plug the speakers into the HTX-22HD via the easy spring clip connections and you'll instantly have an immersing and exciting speaker system which is perfect for Blu-ray, gaming and DVD home cinema.