Hmmm.....can't edit post above. Anyway, what I was left with is that ~7dB peak centered at 50Hz. That's much less problematic with voices than the elevated curve from 140Hz to 50Hz. That stretched more than an octave and it was in a range that our hearing is much more sensitive to. The remaining problem centered at 50Hz is nowhere near as broad and it's far enough down in frequency that it doesn't bump into the range of human voices..