My headset is an Altec MZX206 which has only 16 ohm impedance. Nonetheless, the sound through my headset is not always sufficient (if I'm listening to an audiobook while walking in the city). I would like a way to increase the 3.5 mm jack volume beyond it's supposed maximum. I've had mp3 players before which had volume limiters which could be overridden when necessary. Is there such a thing for Android on the U8150?