If interested in any EQ tweaking, I found a slight EQ correction tamed the slight brightness in my brief listen to your sample . I cut 1k ~-1dB, 6k ~-.5dB, and 12k ~-1.5dB, leaving 3k untouched to retain good vocal clarity. My hand-waving- that's off-the-cuff, subjective, may be headphone dependant, etc, but its not out of line with what I find commonly helps 406x recordings.
Thanks, Gutbucket!
So just for fun I popped this sample into audacity and tried to make some sense of your notes, and for the life of me, I couldn't figure out how to do that. I'm sure I am missing some audio engineer speak. I did find the EQ, and found many ways to turn the knobs, so to speak, but I can't even remotely understand how I would "cut 1k ~-1dB, 6k ~-.5dB, and 12k ~-1.5dB, leaving 3k untouched" even though it seems so easy as I type it, I have no idea what you are saying! I had to come back and tell you because I really, really feel stupid and like I should sell all my gear and give up.
I might actually just be going crazy.