All I'm saying is that whole medium wave AM band is only 0.5MHz wide, and has bigger problems with long-distance interference and requires higher transmit power

All I'm saying is that whole medium wave AM band is only 0.5MHz wide, and has bigger problems with long-distance interference and requires higher transmit power than the 88-108 FM band which is 20MHz wide. You meant 1kbit ot 1kB/s? Neither is "am-quality mono", it's only acceptable with specialized voice codec. Music starts at 32kbit, pls source your claims if you know otherwise.