Not sure if anyone has already posted this, but I noticed with my update a few days ago that Poweramp now has a setting that will let it activate Beats Audio on phones that have it. I tested it, and it does work.
It is buried though...navigate in the player to the "volume" section...it is a toggle button on the upper left part of the screen between the Balance and Stereo X knobs. It is just labelled "beats". You will not see the logo or anything. But it will be working.
(Cannot embed image, sorry)