I dont know that it does do what you are asking.
Have you set your output to full range?
I prefer not to use the Windows mixer for music because it reduces detail substantially.
I use Foobar 2000 and WASAPI plugin to bypass it.
What makes you think Windows is limiting bass?Do you think I still need these plugins if I don't use int. sound card? I use Uni Xonar drivers. This problem is only with hard bass songs.
Edit: I use headphones maybe I need headphones amp? My headphones use 40ohm and with 40mm elements