one thing is should be is quieter.

However such is the misuse of language to suit whatever the purveyor wants it to mean, acoustic can mean amplified. In that if it isn't plugged in. The microphone doesn't count?   I have seen the word unplugged used to imply acoustic. The microphone being rather noticable. The acoustic stage nights in Bath (UK) had "PA available" emblazoned across the website. I doubt they survived.

Anyway - good luck if it is acoustic and if not, I have earplugs.