I just put a set of 6000cs in my car today. I built some kick panels and have built some enclosures for them. The enclosures a re pretty small and are filled with fiber fill. They are surprisingly good sounding! They dont have harsh sounding tweeter (but I have them wired _3db) They put out alot more bass than what I thought they would, Especially after hearing peaple say they dont make good bass. I am powereing them with an orion 702 cobalt. I bougth them for $35 off of ebay, and are very happy with them.