Those look like the Superlux HD 681. How is the treble? Knowing that you know good sound when you hear it, I'm guessing these are not the same exact headphone. I gave away my 681s because they were like an icepick in my ears - I'm guessing it's a spike at around 5-6K.
Comments
Sorry, forgot link...
https://www.parts-express.com/talent-smh580-semi-open-back-studio-headphones--233-350
InDIYana Event Website
InDIYana Event Website