If I have it right, the original question to start this post was "Why don't more players use Micro Bass amps" para phrasing... I do not have the answer to that question as I don't use one myself, but after reading what this discussion has turned into. I can say that I know why I'm not interested in science, math and engineering... Man, I'm busy playing bass in a band, not building watches... Sine wave, Topology, Rails, Dead Zones, I'm envious of your knowledge, but NOT... Enjoy your chatting...
Amplifiers *(edit: HEADS!)......the most technologically complex aspect in bass playing.
If not here, in this "amp" thread, there where would you suggest an in-depth discussion of amps?