Answers: it is supposed to be for if u play ur mp3 player contained by the car and it recreates the frequencys that ur mp3 player eliminate, below like 100 hz or somthing, but it really does net ur bass way channel louder, and cleaner than turning up the bass on your h/u.... pricewise i dont know
Actually an epicenter "RECREATES" missing bass in songs that enjoy little or no bass, songs with bass you should not use an epicenter since it will verbs your subs.
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