I have the HD800 hooked up to my HDP playing Apple lossless files.  I rave really appreciated the strengths of these headphones.  Like many of us out here find the bass to be a bit light for some music.  Lately listening to some Rage Against the Machine - the light bass has been more frustrating...

Sorry for the noob question. Right now I am using my Denon 3805 reciever connected via optical out of my Creative Labs Titanium Xfi sound card (Dolby Digital Live). I used the headphone out of the reciever. With this setup, are the DA converters being used from my Denon reciever (which are...