Ability to adjust max NAV instructions volume level

[igorbmwx6]

I have this issue, which I am hoping that someone else out there has had to deal with as well. After completing CCC to CIC retrofit, maximum navigation instructions voice level (maximum limit) is way too low (too quiet). Basically, even when I adjust it to as high as I can adjust it, the navigation instructions voice is very quiet, that if you are listening to a music or even the general road noise with open windows, one can barely hear it. Once I switch back to CCC, all is fine. I have LOGIC-7 top hi-fi sound system with 16 speakers in the car. One solution that I know is to go to a more powerful after-market amplifier, which I would like to avoid doing. Is there a parameter in CIC that I can program to re-adjust this max. volume level? Is the LOGIC-7 amplifier different in 2010-current models from 2007-2009 models? Any input on this issue would be greatly appreciated