Thanks for the explanation.....I am going to look at the EQ instructions a little closer. Joe Bloggs, in the Somic MH463, did the same thing as you, his graph, like yours is posted in that thread....I copied his settings, and the MH463 improved quite a bit. Just as these settings for the HI2050. I need to do some work....I am using jRiver Media Center 18, and it has two different Parametric EQ settings, but I keep a MS Word file with screen shots of the settings, to use to toggle back and forth between HP's. I don't have my DT880's listed in my sig, but the rest of my IEM's and HP's are listed. I am using an Audio-GD NFB2 DAC, and a Ming Da tube amp with some wonderful NOS Mullard tubes, and I have the advantage of using DHC Peptide type 2 litz on all of my headphones. The cables make a big difference, but a good DAC and Amp should be purchased first. I have as much $ in wire/cables as in my HP's themselves.
The Sennheisers are very good, and I have several cables, DHCPeptide, DHC Peptide Hybrid, DHC Fusion, and Cardas cables, DHC Peptide on my budget phones and DT880's, and the budget phones give the Senn's and the Beyers a good run for the money. The MH463 had clearer sound that the Senn's, and better separation and low end, as well as the 2050 and the Pro 80, nothing lacking against the Senn's at all. I will be keeping them all long term though! Actually I listen to the Senn's less that the budget phones, mostly to compare sound!