I have some Mid to High-end equipment. Parasound Halo P3 Preamp/CAL Audio Labs CL-15 CD Player/2 Parasound HCA 1200 amps (Mono)/Apogee Centaur Major Speakers. I was thinking of adding a Graphic Equalizer. I guess my question is: Should I do this or am I going to mess up the sound of my system? I feel I am missing something or maybe my hearing is going the older I get.