Eh hem!...Subwoofers... What do ya know?

Yes , if there is ideal placement and no distortion , timing on and on , the below 80 applies. Then its good . 

Everytime i hear a rig with a sub for 2 channel, i can HEAR the subwoofer, its not a balanced / natural tone to my ears

@redmosessc if you ever close to Miami lakes, FL let me know so you can come by and listen by yourself, I have 4 subs and you need to put your hand on the driver sometimes to check if these are working. Of course you can hear what they produce but not in the boomy subwoofery effect, very natural indeed

Then they are running higher than 80Hz.

Yeah that is a typical mistake I made myself years ago running them at 120 sometimes 150 and below, looking back, what was I thinking?

Just wanted to add that using the downloadable calculator here I think the measurements I entered fairly well replicate what I am hearing.

For fun I put in specs for speakers I am interested in and they really do add seem to alleviate the issues.

Assuming this calculator is symbolic of my issues of course.

I didn't enter what Focal says the low frequency roll off is, but rather Stereophile's summed measurement at -3db

redmosessc10 posts12-16-2019 11:35amEverytime i hear a rig with a sub for 2 channel, i can HEAR the subwoofer, its not a balanced / natural tone to my ears. I know this can be tweaked but i have yet to hear one that i liked. Golden Ear, Martin Logan and other speakers that have self powered subs do a better job at integration than an external unit but i still always HEAR a sub in the room. I do have a sub for cinema but when listening two channel i prefer a passive speaker configuration.

I agree.
 
Speakers with built in subs can have better speaker to sub integration. Unfortunately optimal speaker locations may be a poor choice for subwoofers with extra low frequency capabilities exciting a rooms bass modes and nulls. Raising the speaker subs low pass filter helps but defeats the subs capabilities of producing a surprising amount of recorded ELF.  

Multiple stand alone subs can reduce or eliminate room interactions but that's only one aspect of subwoofer integration. Unless there is some means of comprehensive multi-band parametric frequency equalization, Q, and gain control through the crossover region without using high pass filtering, matching the stand alone subs to the speakers presentation is impossible.
An alternative is to select a hard crossover point and reduce the gain until the subwoofers noticeability is reduced which many consider state of the art. Its not.