So, on my uke, all the strings sound pretty good. My second fret is a bit high but I don't get any rattles. Only issue for me is the C string has a boomy sound around the 7th through 10th frets. I changed the original Aquila fluorocarbon to a living water C string and that helped. But, it is still not there. I really would like my strings to be balanced.

What can I do?