I appreciate that you were trying to help, but please read
THIS and
THIS 
and let's stop derailing this thread. Your condescension is also unnecessary.
any forum, it would really do you well to actually
read through to get context on what has already been discussed instead of randomly jumping in with suggestions, because chances are, 99.9% of the time, your random suggestion has already been tried and discussed. Case in point, had you done your research, you would've seen that -- YES, I made sure the volume knob *dim audio* function was not enabled, and I own BOTH the 80
and 250 Ohm DT 770 Pros.
Thank you
@Bamboszek for proving and supporting my point:
Exactly what I said above -- So thanks again for supporting my point about the detriment of using low impedance cans with a high impedance Audient, and I also appreciate the links you provided.
Also, I was referring to the Post-AKM fire Mk2 iD4, not your Mk1 or pre-AKM fire Mk2 (see both links above or scroll back to page 12). If you read through this thread, you would see that the internals changed after the AKM fire.
Per the above, he is using LOW impedance cans with a HIGH output impedance iD4 Mk2 -- so sound WILL be distorted. Just watch the link I provided above to JK's video on impedance, as he demos it in that video, and you can visually see the distortion of the sine wave he uses when he shows the effects of a high output impedance on low impedance cans.
Look at how high the output impedance of the iD4 Mk2 is.
View attachment 277503
We don't need to keep discussing this anymore as it's veering off topic, plus
@Bamboszek -- you and I are saying the same thing (Don't use low impedance cans with high output impedance interfaces, as sound will be distorted). I've already returned my Audient and I'm just going to go with an amp instead.
Thanks again for all your responses. My personal experience still stands -- Post AKM-fire iD4 Mk2 is not powerful enough to drive 80 or 250 Ohm DT 770 Pros, an amp is still required for this use case.
Cheers
