SennheiserConsumer Audio HD 660S2 - Wired Audiophile Stereo Headphones with Deep Sub Bass, Optimized Surround, Transducer Airflow, Vented Magnet System and Voice Coil – Black

Got these cans for 400 dollars for black Friday.SOUND:These headphones sound better to me than the rest of the 600 series simply due to their better sub-bass performance. They have a pretty wide soundstage, have excellent instrument separation and sound good with all music I have thrown at them. The mids perform excellently, just as the rest of the HD600 series, and the treble is sparkly and nimble but not fatiguing. These are a good, balanced, warm sounding pair of headphones that are well worth the price that I bought them for, however I could not recommend these for $600 as this price forces competition with a higher class of headphones.COMFORT:These headphones are the most comfortable pair I own, with nice soft earpads and a perfect amount of pressure that gets a good acoustic seal over my ears. My head is on the larger side, so as to the issue of clamping force, I really did not feel that they clamped too tightly. These are the kind of headphones that I could wear comfortably all day and forget I even have them on.DRIVING EQUIPMENT:To those that have mentioned an unimpressive performance from these headphones, when used without a headphone amplifier or properly specified piece of equipment, these headphones tend to sound a bit soulless, empty, or a bit muddy. However, the great thing about the HD600 series is that they tend to scale very well with good sound equipment. The difference in sound that an entry level Schiit DAC+Amp stack made was well worth it and really made these phones come to life. This does mean, however, that you should also consider the cost of an amplifier and DAC unit as a cost included with these headphones, so at minimum another $200 added onto the already expensive price. There are many other good options for headphones that are easier to drive and do not require a dedicated amp for this price range, so if this isn't for you, I would look elsewhere.Overall a great sound albeit a bit overpriced at MSRP.

Quite a few people will say these headphones aren't great for gaming. Ignore those clowns.Video Games: 10/10The issue is that 95% of headphone reviewers when asked "what makes a good pair of headphones for gaming" - almost exclusively look for the widest soundstage possible and super clear treble. Which I mean, is great for pinpointing footsteps. But there are people out there who play more than just FPS games. If you're a solely hyper-competitive FPS gamer, maybe something from the Hifiman/Beyerdynamic lineup is better for you. But I would recommend these cans for everything else.If you play any games that are immersive in nature or are known to have good sound quality, such as Cyberpunk 2077, Elite Dangerous, or Elden Ring. You will love these headphones. But, even in games like Rainbow Six Siege, I didn't perceive any noticeable drop in my perception of where people were compared to my old cans which were the HD598 CS. In fact, that aspect is pretty much the same, and hearing gunshots and explosions in Rainbow Six was pretty jaw dropping as well. You can hear the rumble of an impact grenade from the other side of the map sort of bellow in your ears. The low/deep growl of a deagle firing off sounded impressive as well. I did EQ mine on the low-end to output some nice rumble.Cyberpunk 2077 was easily the game that blew me away the most. It legitimately sounded like a different game to me - it's THAT drastic of a difference. I heard things I hadn't heard before - as if this is how the game was MEANT to sound. It literally makes me feel like I'm there when I hear cars rumble past me on the street, and I think it's as close to life like as you can get from a pair of headphones. In another instance, there was a highway above me and surrounding me was a market full of people talking, in game music (like from radios), advertisements, etc - and I feel like I'm standing there, in the market. Imagine the cars from above encompassing your entire soundstage in the background, like further away, but the details of the market still sound closer and don't lose their detail.Music: 9/10For music, there's plenty of other reviews that cover that, but these don't disappoint. I mainly listen to video game OSTs, rock bands like Cage the Elephant, or metal like Sabaton. Definitely an improvement over my old 598 CS.Movies: 8/10I haven't tested these out with movies/TV shows too much so I can't give a fair opinion on that, but so far they sound good, nothing yet that has super impressed me.Comfort: 9/10These feel fantastic, some people claim the clamp force is too tight, but it feels just right on my normal sized head with normal sized ears. They might feel a bit tiring to wear for prolonged periods, but supposedly this will subside with time.Overall: 9/10I am truly impressed by these headphones. The details, bass, sound quality, and imaging capabilities of these blew me away. Easily worth $400 on sale. If anything, it makes me appreciate the source of audio I am hearing more. For example, I can more easily tell if a game had a higher quality audio team working on it, or if a song was produced in a studio vs some trash recording.Sidenote:I am someone who likes emphasized bass, neutral mids, and neutral treble. I find emphasized treble to be annoying and shrill to listen to. I was also that kid in high school who would have to cover their ears completely during fire drills (and it seemed like I was the only one) - so if that sounds like you then you probably have the same tonality preferences as me. I also tested these with a Fiio K7 and Fiio E10K as my amp/dac sources.