I just installed some 6000s in a friend of mine's car with the nine.4 package deal, so they were getting around 150w rms each... and let me tell you they sound great. The tweets scream but have excellent quality and the midbass is very tight and snappy, not too much midbass output though, vocals are extremely clean. Overall they are a very good set for the money. This was in a Toyota Matrix with the 12" Avalanche/Soundstream PIC 2.880 in the back... //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif