For the price, you won't find anything better sounding than Beyerdynamic the dt 770 pro. Though, there are other closed-back headphones at about the same price that sound balanced. If my dt 770 pro ever needs replacing (e.g., they have replaceable parts), I'd go for the aiaiai TMA-2 headphones (build your own headphone option). https://aiaiai.audio/headphones/tma-2-build-your-own/s02h02e02c02. Source: almost 2 years ago

For BIFL designed headphones, AIAIAI sells modular headphones with more replaceable parts than most headphones on the market, you can even 'build' your own: https://aiaiai.audio/headphones/tma-2-build-your-own/s02h02e02c02. Source: over 2 years ago

The Aiaiai stuff is fairly popular in the Techno community: https://aiaiai.audio/headphones/tma-2-build-your-own/s02h02e02c02. Source: about 3 years ago

There is eqMac with 10 band eq in its free version. Its pretty good! Source: 12 months ago

Https://eqmac.app/ (I can't recall if / where this has a full parametric EQ). Source: 12 months ago

Very useful program, but god the UI is so bad.. As if it was designed for a touchscreen interface, and yet still poorly done, doesn't respect your aspect ratio, wastes ton of empty space, and the transition animation looks jarring Gnome UX is killing the linux fun to me.. They want to clone the macOS UX, but they don't understand what makes it great.. Look at this beauty of an UX: https://eqmac.app/. - Source: Hacker News / about 1 year ago

EqMac: open-source, AUD$4.5/mth or AUD$60 outright. UI is a bit cluttered but pretty simple to use once you get the hg of it. Source: about 1 year ago

Https://eqmac.app/ has a free version. Source: about 1 year ago