It seems to me, learning as I am, that most speakers have the same basic anatomy.
I had a pair of Technics floor speakers decades ago, they sounded good. Now that I am actually trying to understand something about sound systems and how they operate, I've listened to a variety of modern speakers and some sound better than my old Technics, but actually, some don't and some sound worse.
I am sure that speaker companies must spend time on development; but still and all as I look and listen, it seems to me that the raw materials involved in creating a speaker are about the same.
What accounts for the disparity out there? If the raw materials are in fact about the same for any speaker, why would any company bother making something of poor quality when with a little effort they could turn out a respectable product?