You should open the Volume+ app (remember don't press the back button this will close the app)--> Press the Home Button when finished with the settings, Check Speaker Modifications, check Virtual Room Effect, Go to EQ settings I have my setting on "Selective" (you can choose the setting that is best for you),
Volume level (I have mine on +8 (this is 8 more then the EVO 3D's top volume) with the new update for the Volume+ app it goes all the way up to +14 (wow, nice, but like I said mine is on +8), Bass Enhance I have mine on +2, Virtual Room +6, Check the next Speaker Modifications (under Advanced Settings-will automatically override), under EQ Settings- WARNING-be careful I have: Low 39 (don't worry these setting go all the way up to 200) Low/Mid 98, Mild 144, Mid/High 160, High 170, Volume level 10 (goes up to 15), Bass Boost 5 (goes up to 15), Echo/Delay 4 (goes up to 15)
I have the same setting for the "Headset Setting" settings for the headphones. These are my settings. I had them set like this for the last week and a half no problems. Remember the Volume+ app must be running in order for these setting to be effective. Most people close the program on purpose or by mistake then claim the app doesn't work (any app that is not turned on "won't work" Lol)