What if the margin was 70%? 60%? 50%? Since you dont know its as likely as your 80% guess. Sales and marketing is an important role, however, there are alot more good salesmen than good speaker designers. You make it sound easy and reasonable people can agree to disagree.
I’m not in the market for a Phantom either as they are fugly. Your guesstimated breakdown has nothing to do with what is inside the speaker, the parts, etc. Once again, I’m not defending the speaker in sound or cost but I am not going to make a value argument without any clue…