Hehehe, I once met a guy who loved climbing. He was a huge man, about 7' tall and like 220Lb of pure muscle. He once carried a gasoline electricity generator on his back, just to be able to use a drill so nailing down the safety cord to the mountain wall would be faster.
Well, no human being is exempt of it We have a say in Spain: "God raises them and they gather together", which seems to have an English equivalent: "Birds of a feather flock together", although it misses a part of the sarcasm. Anyway, we're doomed...
Jordi, Little Dot is a POS or POJ (piece of shit/junk). I don't know the other one, but probably too.
Join the dark side and build one of these: Crack and get yourself some decent headphone like the Sennheiser HD600. Cheap shit always will be that, just shit.
Now read your welcome PM thoroughly and don't post more question like this
that not all pinnae and external canal affect sound resonances the same, is a fact. No one argues that. My point is about the perceptual and clinical importance of such differences being in the irrelevant side of things to explain why we all hear in different ways. We tend to forget that we're not just ears, but that behind the ear there's a huge brain trying to explain and to fill the gaps. Placebo effect and expectations play a way larger roll.
If those supposed resonances had a real impact in the frequency response perception when listening to headphones, we'd need audiometers for clinical use with individual calibration