I got two 12" subs that sit in my back seat in my 2001 F150. But I was going to get a custom box to put the subs underneath my back seat so I can have more room but I was wanting to know if anybody knows if it affects the way they sound in the truck. Do they beat better and louder just sitting in the original sub box on the seats or would it be about the same if I put them underneath the seats? Reason im asking is because there not that powerful as it is so I didnt want to do it if it would make them sound any weaker