Root Hack:   http://forum.xda-developers.com/galaxy-s7/themes/req-dual-speaker-t3339809

I recently got the FiiO E5 for amplifiying my mobile phone headset output before entering the car AUX Input. I would like to make this solution more permanent and put the E5 behind the dash, to be on and powered and on maximum volume when the ignition is on.   Is there anyway of modifying it...