When making one's own cone, there remains the problem of the outer surround. It almost has to be made from cloth or chamois. Some early thirties speakers were made that way. Also getting the suspension compliance right has to be taken into account. Too floppy and the cone will bottom out and distort. Too stiff and bass suffers. The front spiders mounted with a screw on early speakers could be made as stiff as required, depending on the material thickness and how the spirals are cut.
GuyIncog:
1970's station wagon :
