guys, why is it that there are cars na kung nasa loob ka malakas yung bayo tapos pag lumabas ka mahina lang while on the contrary, there are cars na pag malapit ka sa kotse or nasa loob ka mahina yung bayo pero pag malayo ka sa kotse todo lakas at gapang ng bayo?

this is the case kasi between me and my friend. what's the reason behind this? btw, 800watts yung subs ko na naka sealed na nakaharap sa trunk lid. siya, sedan din pero isang sub lang na 500watts sealed nakaharap naman sa back seat.

please enlighten me on this!