Best way to get LOUDER audio? (rooted,booted,twrp, but stock rom)

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http://forum.xda-developers.com – Even at full volume, this thing is pretty quiet while playing movies. I've tried multiple video player apps before settling on BS Player (best compatibility with my files), but I'd like to know to get louder audio. Has anyone had success with a DSP / Equalizer / Beats Audio / etc? This guy seemed to have issues with beats, so I was scared to try anything on mine: http://forum.xda-developers.com/show....php?t=1801631 (HowTos)