@Piemonkey you’ve just discovered the inconvenient truth about headphones, which objectivists and EQ-heads do not want to believe exists: there are different tiers of driver quality, and two headphones EQ’d to exactly the same frequency response will not necessarily sound identical. So many people spend days and days trying to find “the right EQ settings” that will match a $100 headphone to a $1000 headphone, convinced that audio is all a scam anyway and a little bit of EQ will be like a firmware update to improve performance of the Steam Deck or something.
Rant time! Frequency response graphs literally just how much louder or quieter other frequencies are relative to a 1 kHz midrange tone, and they’re created with simple, artificially generated, perfect sine tones with 0 harmonic overtones (purely just the foundational note). Like music from a Sega Genesis or NES, or maybe even an Atari
It does not show the attack and decay of a headphone’s performance (though a square wave does), it does not illustrate where a foundational tone causes sympathetic resonance from the enclosure in other harmonic frequencies, and quite simply the beeps and bwoop test tones do not represent the more complicated sounds of a band full of instruments playing at once, or the entertainment value of audio (tho I won’t bash anyone who admits that they just enjoy testing and science more than music and games).
Long story short, there was room to improve on the DT 880 design, and I’m glad you found something that has increased your enjoyment!! I’m not quite sure I would blame the headphone for poor phantom rear sound localization (though you’ll note that Mad made the same comment in his original DT 880 review), as a 5.1 or 7.1 speaker setup that Dolby emulates does not have a speaker directly centered behind the head (though I always felt imaging was better with 7.1 than 5.1). I would agree that a headphone might be able to be less boxed in and be able to cast distances out more freely and accurately, without necessarily removing the ability to hear when something is close too. Some people say intimate, I think claustrophobic
I personally wanted to get along with the DT 880, looks amazing and gets heaps of praise, it’s certainly a lot better than other headphones out there, but it hurt my ears and left them ringing. Your comment about the DT 900 Pro X gives me some hope for Beyerdynamic!