I have hearing problems and have played with a few "volume boosters" with no luck! Not on the tab anyway! I use POWERAMP app to play music. It has a graphics equalizer and preamp that boosts volume enough for me. I never found the volume on the tab-2 to be too loud. A different headset can make a difference too!
A problem with a hearing problem is turning the volume up too loud and doing more hearing damage! If your ears feel numb after any any audio even your phone, your are turning the volume too high!