vasilios
10+ year member
CarAudio.com Elite
my xxx15 is in a p4s snail shell now...used to be in a very solid 4^3 ported box tuned to 30Hz..huge difference in sq as it sounds way cleaner. output is a tad better, too. it has a bx1500d on it. as far as the "fake shell", i dont know. try it. its not that different. i hear they only rounded out the corners and edges inside the box as opposed to the staight ones in the diagram. the corners and edges in mine are rounded. james is very pleased with the reults. other than that, i believe its the same overall design..//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif