I have got these recently and was surprised by their quality and solid feel. They quite heavy too but definitely not too heavy. They fit nicely and they are very comfortable mostly due to great extra soft pads. They also isolate pretty well but they could do better.
Carry bag they come with is very solid with very thick texture, rubber material from inside, it will last forever. Comes with two cable one for mobile use = nothing extra and the second one for home use very decent and pretty thick cable, quite long as well about 2m. Connectors are great quality too. Very happy with their look and feel... I did not expect them to be so good.
They might be a bit too big for some people and these are definitely not portable. They are easily driven according the paper but I have only tested them with proper Denon amp PMA-720AE. Sound quality overall is excellent. They have this great Denon signature sound which is warm with pretty neutral highs and mids and slightly overpowering bass but only to make them more enjoyable. I did definitely enjoyed every minute of listening these trying various genres these HAS NOT failed me once. All genres were pleasure and fun to listen. Where these excel is electronic music, 80s synthesizers, 90s dance, techno, etc. Also soundtracks form movies like Inception, interstellar, predator made me love these. Another nice experience was listen to high quality jazz music and surprisingly again these managed to reproduce the instruments very natural and realistic with great amount of soft pleasure to listen to bass emphasis. The song I enjoyed at most with these was the Queen Radio Ga Ga (FLAC).... I almost cried listening to this song with D600, it was just EPIC.
These headphones are further excellent for movies and gaming. When I played Outlast 2 for example they added a different level to the overall experience. I strongly recommend these for long listening sessions as they do not make you tired at all. Can't think of any better headphones for movies and gaming as headphones with such strong / good bass always sacrifice the mids and highs for that purpose. Somehow these D600 don't. Yes, they are slightly darker than other good cans out there and they could do more with better highs and mids. You would not notice this until you compare them directly with other cans then you know the highs could be crisper and mids more forward. I heard from different sources that this issue improves rapidly with some extensive burning procedure. You need to burn these for hours to get the best out of them and I cannot wait to get to this stage. Since few days of proper burning I definitely could hear the improvement.
Note that these cans might be not the right ones if you are for flat or as much natural sound as possible. If you are looking for professional monitor cans with better detail and isolation you might look elsewhere. If you are about great sounding bass with very good overall sound quality plus the fun factor of listening to pretty much anything then these are the right ones for you.
I got these for only 130 pounds here in UK including extra solid case for them and I am super happy about this purchase. I wish I could compare them to the D7100 and to find out what is the buzz all about but my next aim are the D7200 ones. I will post the full comparison of these for sure. If you curious about the direct comparison to MM400 and HP800 then check this link you might found the results surprising: https://www.head-fi.org/threads/denon-d600-vs-denon-mm400-vs-denon-hp800.856127/
Forgot to mention the soundstage which I like a lot. They sound just the right size not too much in your ear but also not too far from the source... well done. I personally think these are quite underrated and people many times don't test them with proper amp and source. If you tried them for longer you fall in love.
Carry bag they come with is very solid with very thick texture, rubber material from inside, it will last forever. Comes with two cable one for mobile use = nothing extra and the second one for home use very decent and pretty thick cable, quite long as well about 2m. Connectors are great quality too. Very happy with their look and feel... I did not expect them to be so good.
They might be a bit too big for some people and these are definitely not portable. They are easily driven according the paper but I have only tested them with proper Denon amp PMA-720AE. Sound quality overall is excellent. They have this great Denon signature sound which is warm with pretty neutral highs and mids and slightly overpowering bass but only to make them more enjoyable. I did definitely enjoyed every minute of listening these trying various genres these HAS NOT failed me once. All genres were pleasure and fun to listen. Where these excel is electronic music, 80s synthesizers, 90s dance, techno, etc. Also soundtracks form movies like Inception, interstellar, predator made me love these. Another nice experience was listen to high quality jazz music and surprisingly again these managed to reproduce the instruments very natural and realistic with great amount of soft pleasure to listen to bass emphasis. The song I enjoyed at most with these was the Queen Radio Ga Ga (FLAC).... I almost cried listening to this song with D600, it was just EPIC.
These headphones are further excellent for movies and gaming. When I played Outlast 2 for example they added a different level to the overall experience. I strongly recommend these for long listening sessions as they do not make you tired at all. Can't think of any better headphones for movies and gaming as headphones with such strong / good bass always sacrifice the mids and highs for that purpose. Somehow these D600 don't. Yes, they are slightly darker than other good cans out there and they could do more with better highs and mids. You would not notice this until you compare them directly with other cans then you know the highs could be crisper and mids more forward. I heard from different sources that this issue improves rapidly with some extensive burning procedure. You need to burn these for hours to get the best out of them and I cannot wait to get to this stage. Since few days of proper burning I definitely could hear the improvement.
Note that these cans might be not the right ones if you are for flat or as much natural sound as possible. If you are looking for professional monitor cans with better detail and isolation you might look elsewhere. If you are about great sounding bass with very good overall sound quality plus the fun factor of listening to pretty much anything then these are the right ones for you.
I got these for only 130 pounds here in UK including extra solid case for them and I am super happy about this purchase. I wish I could compare them to the D7100 and to find out what is the buzz all about but my next aim are the D7200 ones. I will post the full comparison of these for sure. If you curious about the direct comparison to MM400 and HP800 then check this link you might found the results surprising: https://www.head-fi.org/threads/denon-d600-vs-denon-mm400-vs-denon-hp800.856127/
Forgot to mention the soundstage which I like a lot. They sound just the right size not too much in your ear but also not too far from the source... well done. I personally think these are quite underrated and people many times don't test them with proper amp and source. If you tried them for longer you fall in love.