MaxxAudio ON for speaker and OFF for Headphones

Hi! Does anybody have an idea how can I get MaxxAudio working only for the laptop's intergrated speakers and not for the headphones also. If I leave MaxxAudio OFF the speakers are really quiet and sound like garbage but the headphones sound fine and if I leave MaxxAudio ON then the speakers sound fine but the the headphones sound like garbage. So I'd like to leave it ON for speakers and OFF for headphones, any idea how? I tried using a profile with no enchancements and a flat EQ for the headphones but they still don't sound like they should be.