you guys are making a simple thing more complicated especially because it's skipping a major step...at least half way decent monitors (not even mentioning what the soundcard and/or da converter may be because it wasn't listed). another situation would be placement and the room.
jumping to eq or any other processing, except the volume fader, before remedying those issues is akin to putting the cart before the horse.
oh and not compressing isn't half ass mixing and sending dry drums and compressed drums to the master can and has been done (even if not using extreme parallel compression techniques)
I was just going to say. Everything you guys said is right on point with the exception of one major thing being left out. You absolutely have to have good monitors for this to work. You need to accurately hear the changes you are making.
All of the EQing, compression, routing, etc in the world is going to be masked by those average speakers.
You could do the techniques everyone mentioned and have it start sounding "good" to you. But if the speakers have emphasis in the low end, then how do you know the changes you made are for the better? you are merely over compensating your mix so that it sounds good on your system and your system only. That's the opposite goal of mixing and mastering, you want it sounding good on anything it's played on.
It's like painting or mixing colors with really dark tinted sunglasses in a low light room. Do yourself a favor and trade those dark tints out for some reading glasses in a well lit room, get monitors!
My .02. Invest in some decent monitors, then go back and relisten to the tracks. Now when you apply all of the techniques mentioned before, you will be more confident in the changes you make because they will translate better on more speakers.