You cannot have a clue about Helmholtz resonators because you did not even mention them for the bass problem in a room... You mock those who use material treatment favoring EQ alone... It is ignorance...
No, it is impolite and screwed up logic on your part. This is not a thread on acoustics. I am not at all attempting to engage in any kind of full blown discussion on such a complex topic in this thread. You asked me what they were, and I instantly gave you an answer and the cons of the solution. That you don't accept that -- without facts -- means nothing. A day in the park in an audio forum where folks claim all kinds of expertise. Come with data, not just indefinite word salads and personal commentary.