I am currently underpowering two sets of these puppies with an Ac-Delco amp in a 2001 Camaro controlled by a Kenwood Excelon head unit. These babies can handle nearly 90% of the head units volume level before distortion-at which I would never normally listen to on a daily basis. They come with all the speaker wiring to hook up the components (from) the cross-over. Along with grills for the woofers, and two types of faces for the tweeters-Flush mount, and the ones shown. The only real downside to the components are the cross-overs, very weak and feel cheap. But over-all a great buy.