I'm not a subjectivist guy but casually switching cables (from 4.4mm bal to 6.3 single ended) i noticed a change in sound with my arya stealth. I wonder why this happened. Bal sound more spacious, precise and separated. Feels like more treble coming out the set the stage cues. SE sounds more claustrophobic and thick with a bit better texture and heft in lows. Then i remembered i did this change many months ago and i felt the same change. I don't think i have bias or anything. I don't really care. I'm just surprised because i use my headphones a lot and i'm used to how they sound.
They seem to have same power output at 33 ohm. I wonder if there is a change in crosstalk or class A bias or something like that between outputs.