I got an exynos s7 2 days ago I think the external sound has a tad more bass sound to it than my s5
also with my sony mini headphones plugged in, sounds a tad more bassier and louder than my s5 played on BlackPlayer from playstore
Theirs a problem with poweramp player its about 3 notches lower on volume than blackplayer
u can get the volume level back up go to settings, audio, advanced tweaks , direct volume control remove tick from the box , volume rises but theirs a wavy oscillating sound to the music