Quote Originally Posted by DJ Ze MigL

120Hz - 600Hz, these frequencies give depth to a recording, giving vocals and other instruments a strong sense of presence without being clinical. On the other hand, these frequencies are where you're most likely to experience problems with vocal resonance. Too much in this area can be particularly fatiguing.
I think cut around here if the mix sounds too full, try and select instruments that you want to have weight and don't cut them but cut other things in this area to make the mix sound more transparent ... i sometimes find this area is something of a challenge to get right