small bass boost addon for car chip amp?


i plan on building a simple 2x55 car chip amp using a circuit design i got from someone on this board..

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i wonder if i could add a small simple bass-boost circuit to it with a on/off button (to switch the boost on and off from the amp box)

i dont need a complicated circuit just a simple small circuit to add that little extra BOOF sound to the low freqs.. (the high eq i can adjust from the car's cd-player)

i searched the internet and the forum for such a circuit but i couldnt find one....

maybe someone can give me his 2cents or maybe (hopefuly) some sort of a circuit?

any help appreciated
thanks alot !!