I recently have run across some charts in the Critique Class #1 that have had some issues with voicings, especially in the lower register. I made this lesson so that you can understand how voicings work with (or against) the overtone series. Check out the link below the video lesson. Let me know if you have any questions.
Visit this page to get more details on the overtone series. It is the same one I referred to in the lesson above.