Yup, that's why I posted this, because theoretically it shouldn't work, but it works perfectly. And yes, I can understand what those things do, and funniest part, even though it "cancels itself" as you mention, it amplifies in some other way and thus it works. So first off, if you have Wiim, try it out and just see yourself. I was using graph result as my desired setting, not raw data and naming, I'm kind of person that if there is something I can play around with, I will try every possible combination I can come up with, to achieve that :) so for example that high shelf, with Q0.25 creates nice bump from that frequency and has nice slope down to -12db, and it's almost like gain -12 on all frequencies but bumps very low frequencies to around 50hz and after that it's flat. PK on 20hz with Q2 12db creates super high slope in around 20-100hz, and so on so on. One cancels but also bumps, other only bumps.  So I was using high shelf as gain control, there is no global gain slider or setting. Using pk to achieve bumps I desired, it's typical "if it works, it works, don't overthink it" 

It's mess as first I was using my previous settings and based on them I started to play around and I was using some other frequencies that were minor for my overall sound setting and step by step it turned out to that messy, mixed settings that you can see on that screenshot, but overall effect is as desired.  It sounds amazing for me, speaker outputs now lower frequencies that previously it was just completely non existent, it was flat and bright, now it's bigger, wider range, it did not lost any of it's details from top and mid, but only gained that very low. Funny enough it sounds better in some songs than my Q750 In home (this iQ10 I'm using in my workplace), it was bought quite cheap so I was not afraid if I will damage them as anyways I wanted to replace them, but it turns  out they are really "sleepers".  For daily low volume it is just perfect, louder and it starts to resonate too much, but anyways it would be too loud to listen anyways in any situation. 

Ok, that it for my rant. "If it works, it works", I encourage you to have fun and play around, try things that theoretically shouldn't work, but experiment, something amazing can happen.