Acoustic treatment

 
noble100 "It's been proven that we don't even hear a deep bass frequency under 80 Hz"

Proven by who and where is this proof were you part of the study that proofed this I don't have a position on this either way but you have not provided proof while others involved in this conversation have provided to you specific references, quotes, and data and if I were you I would not discount, reject, or disqualify remarks made by Vandersteen he is one of the world's preeminent creators, designers, and manufacturers of speaker systems for Music Reproduction Systems.  

Hello clearthink,

       This is from an audio consultant named Bob Pariseau and he explains adding bass via subwoofers in the article linked below from his website.  He's in the 80-100 Hz camp.

   https://bobpariseau.com/blog/2018/6/5/choosing-a-crossover-frequency-awesome-bass-begins-here

noble100" This is from an audio consultant named Bob"

Bob has no data, no studies, no scientific tests, no listening tests, no researrch, no references, hey he's just like you - you must be Bob you gave yourself away! Richard Vandersteen on the other hand has actual calculated, scientific demonstrated success in explaining, showing, and establishing that not all bass is mono now who do you think we should believe you, yourself, and Bob or someone who actually has done the study, work and science!

Hello clearthink,

     Okay, wiseguy.  There's lots of scientific White Papers on this subject from Dr. Earl Geddes, Dr. Floyd Toole and others.  These are easier to read, however.  I'd read them in order, Mehlau first and then the Dagogo interview with Geddes last.

https://mehlau.net/audio/multisub_geddes/


http://www.dagogo.com/View-Article.asp?hArticle=1047)


Later,
Tim

This is one of the weirdest fantasy land treads I've ever read on A-Gon.So much bad information that it should be deleted.  Magic thimbles as room treatment?  Shear pressures?  Electromagnetism in sound waves? 
Can't hear bass below 80hz?  That knuckle head needs to get his hearing checked.

MurphyTheCat nailed it.

OP, Read the tests on BobGold's site to get information about which materials work better at absorbing bass.  You are on the right track.  The source of the problem is the room.  Fix that. 
Ignore all the other blather about hocus pocus mystical forces at work.