Yeah I'm using line out.
A defective driver saddens me
Could burn in possibly fix this, I've only had it for three days, used it for about 6 hours total.
Another possibility I'm looking at, is that this is my first true on ear, coming from the hd439 and fc300 which are more over ear, I noticed having less isolation than those two so maybe I'm turning up the volume more trying to block out the environment noise
No, you should never turn up the volume to drown out ambient noise. If you needed isolation, Momentum On-Ear is not for you.
So you don't have to turn up the volume as much in a quiet environment?
Burn-in is never a solution for things like lack of sensitivity, channel imbalance, etc.