This immediately fixed my bass rattle in my Skullcandys and increased sound quality; but sometimes the music cuts or breaks, like it has to much do to (it could just be my old iPhone though). The preset equalizer settings need quite a bit of tweaking but that why you can adjust it, right? I like the feature that you can change the background, because whats worse then waking up your phone to super bright white light.
Otterconnor about EQu - the quality equalizer