First off like Epanther said there is no way to answer your question. The reason being is that so many things come into play. If I remember correctly those kicker comps can take quite a bit more power than the mtx will provide, which will further decrease your db rating. Just think about it, if a certain sub always produced 150 db and another produced 170. Which sub do you think would sell more, which one would you see in comps more. (SPL wise of course). The fact is that no company can specify what their sub is always capable of doing, because the first customer that didn't "reach" that mark, could sue for false advertisement. They can state maybe what they were able to obtain, but you also have to remember, that they have a lot more $$ than the majority of us, they also probably have more experience, and have everything in their setup nailed down to a T. So with that being said, I'd say given the "right setup" those subs are probably likely to push close to what Lowrider said. But you never know until you try it.