Increasing the mid bass is going to detract from the "clarity" of the recording - all other things being equal. I had a recording studio for 10 years and I think any recording engineer would tell you that managing the mid bass in a recording is critical. If you have an equalizer just try bumping up the EQ from about 200 hz to about 600 hz and you will hear muddiness.
The point here is that when you change the frequency response of your system it's not unusual to hear unintended consequences.