I'm watching Zeos review the 6XX in comparison to his HD600s. He's saying the the 6XX has a wider soundstage which takes away a bit of the detail plus it has a smoother bass response compared to the 600s. He's saying the 600s are more analytical compared to the 6XX. My guess is that the 6XX has a pretty warm sound compared to the 58X which is likely closer to the 600s which has a more analytical (and brighter?) sound. I wish I could afford both of these and hear the difference myself. I'm currently with 598s which are the best sounding headphones I've owned by far to this point.
https://www.youtube.com/watch?v=JjNu9R2YKks
Mark_M650/6XX is more popular than the hd600. The hd600 is definitely more of a reference sound, and headphones with a reference sound a lot of the time can be pretty boring. Luckily the hd600 is not boring, just a good reference can. But the hd600s do sound more grainy than the hd650/6XX. That graininess is definitely because they are overall less detailed. Z is wrong in that aspect. The 650s don't have an insane soundstage that detracts from the detail, it's just a lovely and natural sounding soundstage. Quite open but they can get a lot bigger.
I will wholeheartedly recommend the hd650/6XX over the HD600, and add the point that I enjoy the hd650 more than the hd800, and more than several others in the 2,000 dollar price range. There's a reason why people will spend 2k on an amp, 2k on a dac, 2-3k on their headphones and still won't sell their hd650, the sound is addictive if you like it, and most do.
UzuzuHmm interesting. .... I was looking online and found someone selling the original 580s for $250 (Canadian) in excellent condition. That for me would be cheaper than the 6XX which is $270 Canadian with shipping and exchange rate.
https://www.youtube.com/watch?v=JjNu9R2YKks