Thanks man!! Did you put the dynamat in your car. I want clean bass with as little rattle as possible. I really don't know much about systems but have a friend with a s-10 that hits so hard. It's like when you hear it...you hear the words in first wave then the second wave is the bass right behind it. Hard to explain but it's the nicest, cleanest system I have heard(not saying much) though. Now can you hook up say the W7...12 single to a 1000 watt amp and be safe. Dont want to add a new alternator. Will the factory subs still be working with these or will they not be playing?