Speaker Cabinets for the Funnder Project

It was brought to my attention that I had not posted photos of the pair of speaker cabinets that I am building for this project.  Each cabinet holds a single 12" speaker.  I do not yet know if they will be partially open back, closed back, or rear ported.  I have built two other cabinets like these, using other wood and methods of joinery.  This design was copied from a Roland VGA-5 combo amp because the materials available dictated it.  The 3/4" construction-grade plywood is not preferred material.  But I found an uncompleted card table project in an abandoned rental house I was cleaning out for a real-estate agent.  So here it is.  The dye was mixed with denatured alcohol as a carrying or delivery agent.  The dye applying is now complete for both cabinets.  I am now applying a finish.

While cleaning out a family members basement, I discovered this book below, printed in 1961.  Does this look familiar Private Fred Hegel?