NI A2DJ vs. Senn.HD-25 (not good)

Just tested my Sennheiser HD25 on NI Audio2DJ yesterday and the sound gets a bit muddy. Can you guys confirm if other models have similar problems as I'm thinking about finally switching from Presouns Firebox over to Audio6DJ.

The amount of mudding-up is the kind that will increase hearing fatigue over a prolong period with a higher volume (aka. in da club). I did notice a similar thing with AKG K518DJ and A2DJ but that was discarded as "probably cheap headphones".

I used to use the Audio 2DJ with my 14 year old pair of Sony MDR-V500's and had no problem whatsoever.

I wouldn't categorize it as a problem, it is more of a nuance.