I've had 2 15 inch solo barics for the past 2 years(with a 1500D on each sub) and im use to songs hittin a certain way. I wanted something different so i purchased the nightshade 18(3000D pushing it) and the songs that hit hard in my 15z dont hit as hard in the 18. why is this and what songs should i play to get the full effect of this beast in my hatch??????