Argon T50RP MK2 question

I just recieved these headphones last week. I find them sounding rather flat and underwhelming compared to my hyper x cloud 2. Both headphones are powered by a NFB11.

The Argons have the balanced mod for future proofing and I’m using a single ended cable for now.

After reading so many reviews on these Argons, I can’t help but feel like I’m doing something wrong here. Do I have to burn these headphones in? Did I pick the wrong amp?

Cheers

Hi! Welcome to HFGF!

Argons are demanding but at least by spec the NFB11 should have sufficient power. Generally Audio G-d is known for going for brute strength over finesse and detail. So, What do you mean by flat? Lacking detail? Not enough Soundstage? If you can fill that in a bit we might be able to help more.