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

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.

Last I heard, you all occupy a single listening position.. you are not some omnipresent being who float around in space.. listening from every inch of the room.

Standing waves occur between 2 parallel walls. Hence, look at the wall spots straight in front of you, behind you, to either side and above you.

Dennis Foley's mention of full wall coverage of ACDA, etc could come in handy with multiple listening positions (hometheater, for example). It has some other benefits as well, but, will consume significant real estate in smaller rooms. ACDA is huge and can give you a hernia if you try to move it around too much.

Very few panels out there will do anything under a 100 Hz. His ACDA will get much lower. But, the correct thing to do is to "cancel out" modes in the subwoofer range with strategic placement of subs, phase correction, etc. Use the panels for ranges above the sub crossover.

For SBIR, you can use panels right behind the speaker woofers or pull the speakers out enough so the SBIR frequencies get pushed into the subwoofer range.

Unless you are an omnipresent being with telescopic ears listening in every corner, your corner traps don't mean much. 

Stop looking at what some flat earth audiophile did as gospel and get a measurement mic. Thereafter, download a free measurement software known as REW.

God bless.