Headphones

So I, know it can just be the tuning, but I feel like something is off.. maybe.. I try to compare the left and right channel as you can do, but I can't clearly tell one is lower. But just comparing the overall feeling of them, to my JBL 210's, I do suspect there might be something. Like I get more sound overall. And enough to throw it off.

And I was just wondering if someone maybe heard a difference (and I mean that can be down to the day, and circumstances and so many factors but..), just thought I could ask.

And the model in question is the E5000, and I am powering it off Topping NX4SD and have tried using it with the gain lever engaged.