hello again ...i think here in the forum in section, share your stereotool settings, are some preset from the past even with the old multi band....but my opinion is put just stereotool as Hans has factory set just use only mb1 as compressor , mb2 as compressor and multi limiter band the wideband compressor as general limiter ,advance clipper as final clipper and you can use agc just as one band..nothing else all the others are not useful for AM modulation are for FM section ...ok keep trying to have the input sound with out as normal as you can

i mean physical....use and am broadcast with bandwidth section if you want to use nrsc preemphasis....
have a nice day