so bass traps in corners do nothing, it seems we have been fooled. or are being fooled.

My Tennessee systems page has room responses before and after bass traps. Mine are huge because i had the space to bulk them up. That helped quite a bit. Most times we have little real estate to work with. 

If you think that's crazy, wait until I tell you that cables don't matter. 

Bass traps . . . Bass traps . . . We don't need no stinkin' Bass traps . . . We got good ole fashon' fishin'pole and worms from the garden . . . I put em in and didn't hear no difference so just went fishin' fer new music I like, left the dang things in the corners, what am I gonna do with em iffen I  take em out anyway, try en sell em on A'gon?  Too much trouble an I don't like trouble,, no sir . . .

OP please just stop and maybe offer something worth even thinking about.  bump  

So the tiny little gray or blue "triangle" corner traps (popular a while ago) always made me chuckle.

Those were not intended for and were never promoted to be bass traps

and I’m not promoting these nor commenting on their effectiveness, and you may well be correct,  but comments like below with nothing to back them up are basically worthless conjecture

And those tiny little "acoustic resonators" (often sold at very high price) are unlikely to do anything but placebo.