Hi All! I currently have focal krx2's in the front door with tweeters on the dash (stock locations) I have a 300/4 arc audio amp giving them 90 watts to each ch. If you don't already know the focal's takes 100 to 200 watts max. I am not really happy with them right now I want them louder! I was thinking of getting the 600/4 HD JL audio amp with gives 150x4 watts. I am wondering what you think about that amp or what you think owns it. I only have 13inches of space for the amp. Money isn't a thing but I care more about how well it will sound rather than settling for something cheap because of money. Don't get me wrong I don't want a amp that cost 1k. THANKS!!!