Phil: I’m talking about the literal meaning of the word acoustic; not about me or anyone else, who or when!
This definition agrees with what I understand it to mean:
“ Acoustic music is music that solely or primarily uses instruments that produce sound through acoustic means, as opposed to electric or electronic means”.
This is not to say that I disapprove of using microphones or PA systems to achieve what other posters have described as “balance” : that’s when it ceases to be acoustic music and becomes electric.