My HD6XX headphone shipped early, I was surprised to find them in my mailbox today! I ran up to my unit and plugged them into my MacBook, no amp or anything, put on one of my favorite test albums (Avalon by Roxy Music) and realized within minutes I was in love. This is just a great sound. Warm, detailed, rich and easy. I'm loving the vocals and midrange. I guess I like warm
I also like that they don't sound worlds better than my H6 Gen 2, something I was afraid of. Those are a little colder and tighter but compliment this headphone nicely. I was worried I would never want to use them anymore or that they would sound way off by comparison. Another surprise, they already sound this good without an amp, and they get loud enough. I both like this and dislike this. I like it because it turns out to be more efficient than I expected. I dislike it because I just ordered the Magni 3 the other day so I’m hoping it does make some difference or else I will have wasted a little money lol. Some things I think can be improved; the soundstage is definitely a little intimate, and they do lack a tiny bit of clarity up top. The clamp is a little strong, but not painfully so. I love the way the pads feel.
Anyway, I am very satisfied with these headphones. It's such a classic, and I don't think I would be much happier spending any more for any other headphone. I'm saying this after only maybe an hour with them. This and the H6 (for closed and portable required listening) are all I should need. I can't thank Massdrop enough for producing one of the leading headphones for only $200.
If Sennheiser made a closed variant like they did for the 800 I’d probably jump on it!