as you can expect, FM25B has a lot of improvement over MP3FM (FM25A), except bass (I have modified as suggested to replace C6 and C8, not add C19, because I hear obvious bass "click")
the first, you can connect external antenna to "double up" your distance (I think MP3FM can do it too), then, overall S/N has a lot of improvement, if you don't hook up any audio source, and turn your radio volume all the way up, you'll find the big difference between them; third, treble, it's suggest to use European standard pre-emphasis, that the treble don't go too harsh, but you can hear "s" more clearly than MP3FM
but something is not good, that ramsey packed wrong parts, that 104 become 103, and I have to pull several 104s from bad FM25B to finish MP3FM...
