Naaa...Anders
Nobody is upset with you for dragging up this old discredited idea.We've heard this old chestnut a few times before,however.
Let's say that you used a test measurement mic to get a really accurate mathematical curve of how your speakers in your room respond to test tones.You take this info and reverse it into a graphic EQ.Now all your mixes will sound perfectly flat,right?
Nice idea,but...
What you have failed to consider is what your mixes will sound like when played on somebody else's system.Unless the listener has your gear with mods,the sound will be just plain off,by the amounts of the "corrections" you have made with EQ.
A better idea (assuming you can't afford to upgrade to monitors) is to use reference CDs to LEARN your gear inside and out.Use a well-produced CD of the style you admire,along with a graphic frequency analyzer like
this to go to school.Compare the graphical readouts of the pro mixes to your mixes.How hot is the bass compared to snare,etc.?
After you have your mix,you want to listen to it on as many different speaker types as you can.Home hi-fi,portable CD players,car units etc.Also,it is a good idea to check all mixes in mono for any phase problems you might have missed.
Good luck and keep on learnin'