These systems are designed for people who are on a budget, who do not know much about car stereo, and who want quick drop-in style bass. They are not designed for any kind of SQ or SPL competition. They will all sound very similar, so an Inifity basslink will not be killing a Kicker powered substation or vice versa. Besides, if you compare the 2 companies, I'd say that Kicker is a far better maunufacturer (quality & reputation) of car audio that Infinity.