Did you know that not all equalization (EQ) is the same? BTW, if you need a reminder of what EQ is, see our article What is Equalization, Usually Called EQ? Anyway, yeah - usually we work with linear phase EQ. But there is also a thing called minimum-phase equalization. Here is a great article by Samuel O'Sullivan that will explain it all to you.
Read the full thing here: http://www.prosoundweb.com/article/in_the_studio_linear_phase_vs._minimum_phase_eq_includes_video