My door project. Thanks to the good folks on this forum for the advice along the way.
Stripped the doors and put two layers all throughout the outside panel and 2, 8X8 squares behind where the speaker will mount and glued some ensolite 8X8 squares behind the speaker as well. Now I am "plugging" the inner door panel holes using perforated aluminum 20 guage. Inner panel has 1 sheet of raamat. I am putting raamat on the inside and outside of each fill panel too.