In addition, the publication says there is a thickened bass booster, and the whole setup will amount to some of the cleanest, fullest, and most powerful sounds coming from a mobile phone. The resulting output will apparently be 30% stronger and much fuller than the one from the G Pro predecessor, and there will be a dedicated Smart Listening app to control the output conditions.
Given the wimpy speakers on most everything but the HTC One line, an enhanced audio experience is a good thing to upgrade if you want to make an impression with your first 6-incher. Seems that G Pro 2 will turn out a pretty great device, at least on paper, despite having an "only" 1080p display, instead of a Quad HD one.
source: ETNews