The internal reflection would be absorbed by the stuffing. Cabasse has done sphere speakers. Rectangles are done because they are cheaper and easier. Would you like me to custom tune your speakers for you as you seem to be unhappy with your speakers. Are they square? Are they tuned to your ears? Are they in TIME?
What did I say to lead you to believe that I am not happy with my speakers?
And yes; my current speaker are in time (as well as phase).
Thirdly; the stuffing will not absorb much in terms of low frequency, how thick is this stuffing.
I was only guessing at the internal reflections as being “the thing.”
or another guess would be resonance.
What is the theory behind a perfect shape?
Why is a square box bad?
Back to the question… who did the research that you alluded to?
Can you provide a link?
@dekay nice parliament.