Originally Posted by theuprising
It has a large droning 128hz hump but yes it has an annoying sub-bass rolloff. Though overall it is a very warm and laid back headphone with some treble sparkle to bring it to life.
May I ask how you identified this frequency? Please don't post a graph from some website. Measuring headphones is extremely difficult and the results at the frequency extremes are typically discounted in their entirety.
Can't say I'd call the A900x very warm and laid back, either.
Without EQ, its pretty good for all genre's, given that the song doesn't emphasize 9-10kHz, otherwise prepare for some ear bleed. With Accudio-like EQ, it feels like a veil has been removed from your ears, practically a must for lower treble reliant genre's such as modern rock.
There really isn't much sonic information at 9-10K. The final shimmer of a cymbal (not the strike or its direct effect) and room ambiance. Still not sure what you're talking about.