Right you are, HTnut, so ... between 20Hz and 10,000Hz and between 10,000 Hz and 20,000Hz, Speaker A generates a pure tone (B flat) with a perfectly flat frequency response.

The two graphs are identical - ruler flat in the words of Kcarlie.

Thanks HT pointing that out.

Enjoy the Music. Trust your ears. Laugh at Folks Who Claim to Know it All.