App that boostes bass for iPhone?

I switched from a sgs1 to a iPhone 4S and and the sgs 1 and there was a app called power amp that boosted bass and everything and I can't find one for iPhone that boostes bass I know that I can change the bass and stuff on the iPhone but its not enough I want a app that boostes it

Instead of looking for an App, have a good look through iTunes for Settings and Equalizer, I don't exactly know what it's like on the iPhone but I know the desktop version has one preset named 'Bass Booster' so I'm presuming the iOS App version would be pretty much the same.

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