How to use the built in equalizer with xiia without loosing volume sound for music

Ok what I find happens when I adjust my equalizer on xiia app...I notice the current loud-Ness of the music is substantially lower if I move any of the Bass through treble bars up .I'm certain it hasn't always been like this.I've owned quite a few smart phones from epic to note 3.I noticed it on the Samsung note 2 .This is all while I'm using the player and say listening to groove salad station ect.I do have power amp installed and life vibes music fx on my note 3.