So I have an 08 Grand Prix GXP currently with one 12" xcon in a khaotic enclosure and it beats hard and sounds good. Powered by a stetsom 1.5k. But I havent done a project in a while and I kinda want more bass in my car. Recently added memphis pf 6.5's and 6x9's powered by my p400-4. I found 2 12" 1500 series dd's a guy has for sale with a custom built box with 6.5 cf for $225. Would this beat harder than my xcon. I know its a good deal but if it dont get me anywhere no need for the buy. If this isnt a upgrade let me know what you guys think would be a better 2 sub combination than my single xcon or even a better single combo just figured might as well throw another sub in the trunk already lost the space. Thanks Logan