Smeggy Modified Denon D2000 Frequency Response and CSD Waterfall Plots
The graphs say D7000, but it's really D2000 I believe. CSD floor is at -35db which I think is a good number to standardize on going forward (I will take custom requests.)
It'a now a totally different headphone without the bass bloat, but the treble is still too problematic on this headphone. Note the poor matching in the treble area - the different ringing characteristics between each channel.