I also have the 880 pro…
Usually for tracking/mixing I use them with EQ, 4.8 db boost at around 35hz, then smooth curve up to the mids. Then you will hear the bass and the mids, good sub bass also although a bit blurry.
The normal response curve sounds good only with mastered music. If the bass/sub is mastered right, it will be present just at the point where you hear it clearly, but a bit less and you will notice it is too little by not hearing it clearly any more.
The really good thing with these is the stereo image is very wide and clear and outside the head. This also means the highs are boosted. When I had them new, they were a bit sharp but that settled.