I have tried equalizerAPO but I did not notice any difference. It was as loud as before. Did I miss any step? I think my Hi12 is lound enough w/o equalizerAPO just by adjusting the speaker volume slide bar at the lower right corner.
There are holes for the speakers only on the side edge of the metal casing. Does anyone in this forum dare to try drilling some holes on the lower left and right corners of the tablet touch screen (right where the speakers located) to see if it improves the sound quality? There is a chance that the touch screen will still be working by doing so.