Sounds like QC sucks on the ADEL MAM's.  I'm glad they never shipped mine.  My testing other modules in the lab showed they varied a lot as far as backpressure is concerned.  Even pairs were way off.  That flapping is annoying!  

Maybe placebo effect?

Yea...  I am going to sell my ADEL modules (that is if anyone wants them) as I have lately only used them for test in the lab.  The M15 is a keeper!  I also put the M20's in if I need more isolation when monitor mixing.  The added bass is not as bad as the bass pounding your backbone from all...

Cool!  I bet you will love your new A18's  

Agree.

What IEM's are you using?  You should try the M15.  I think you would like the change over the M20.

The science behind this is pretty elementary.  As far as the science behind the hearing loss aspect it is also explained.   "When a device is inserted into the ear, the canal is literally sealed and pneumatic pressure stiffens the column of air in the ear canal – just like if your finger were to...

When someone post about the ADEL I don't jump on them to defend the APEX technology like you do when someone post about the APEX.  BOTH DO THE SAME THING.  You are correct about the physics being clear.  I know exactly how both work.  I did a modulated pressure test to simulate low frequency on...

No... It's true Brooko doesn't have my ears.  What I state is 100% true.  Why do you always refer to Brooko and argue with anyone who states how the best sounding module happens to be the M15 ???   Both Technologies do the same thing.

How much better do you like your M15 over the B1?  I have both ADEL and APEX M15 and M20.  I prefer the M15.

You won't have any pressure related issues at all.  I can listen to my A12's with the M15 all day every day with no fatigue.  I can't say that for other CIEM's I have had without the ADEL or APEX.  Both systems work equally and well.

If your talking about the bass to me the APEX has tighter more accurate bass.  I have both. B1, G1, A20, A15.  The A15 is my favorite.  I never received the MAM's I ordered so I can't compare them.

  Good stuff!  Sounds good with the M15 also.  I have a lot of Hi Rez FLAC from them.  That Bass is gnarly. Thanks for sharing.   

I thought #6 in the first photo is DLNA.

Cool!