Hi Polly...I am not familiar with Audix....but am not quite understanding you when you say it automatically EQs. Every voice is different and certain mics suit individual voices better but each mic has to be Eqd for different tastes, applications, voices, sound systems and acoustics. These are always changing.
Mics have come a very long way over the past few years. Technology has advanced at a breakneck speed and music technology including mics has improved beyond all recognition plus have come down drastically in price...glory be...
It is important to choose a mic that suits you and your budget.
Most mics either add to or take away something from the sound source. Some add a little bottom some are thin and add top end.
The best mics capture sound exactly and neither add or take away anything. It is important to know how a mic will sound for your voice so try before you buy is best. One thing I hate is snobbishness abut brands....There are some who think Shure or some other make is the best.....The best mic is the one that suits your taste, needs, pocket and sounds best for your individual voice.
Setting up the mic is down to how you want it to sound.
for live work I always start with everything set flat without any fx and then adjust things till I get the sound I like....IMO a good mic is when I do not need to tweak anything everyting is flat and does not need any changes to the EQ.
If you want the vocalist to be loud and obnoxious then just turn the gain up...LOL