Yeah. It needed to have 300ohm otherwise it's not consider a 600 serie Sennheiser by the "audiofiles" herd. I own the 660s and I wouldn't change it for anything.
@@angelOcrisu I absolutely love my 660s. I wouldn’t change anything about them. The comfort is great and they just disappear on your head. Also built like tanks. Mine have taken a beating and they still look new.
Better 650s doesn't sound as exciting as better 600s. All that 600s are lacking from being a perfect headphone is more bass and perhaps more sound stage. So are these 650s with better bass and more linear treble, or are these just 600s with better bass?
Great comparison with 660s (that I own), and thank you for using fresh ear pads on both models, it shows that you are serious and know what you are doing.
As an ex owner of Hd 600 and current owner of Hd650 I can definitely say I have a lot of love for this series. Although Lcd-X, Hifiman He1000Se and Hd 800 are also part of the collection...the 600 series will always have a sweet spot in my heart, as sweet as theirs mids. They all SCALE LIKE HELL with top line dacs and amplifiers! Trust me, if you still think Hifiman Sundara is way better, as I often read...YOU DIDN'T DRIVE THEM TO THEIR FULLEST! I know not many people drive 400-500$ headphones with 5000$ systems, and maybe also doesn't make sense to do so , but...IF YOU DO...OOOH, BOY, what a surprise! Very good description, Sandu, I always appreciate a legend headphone and a legendary reviewer😃👍
Very Good review, Wonder how they compare to Focal Clear /MG and HD800 as dynamics , transient response , and technicalities. Also wonder if Sennheiser will update the hd800 series to hd800S2
I have the 660s2. Iv'e owned others including the 600 series to the 800S. The ONLY benefit of the overpriced 800S is the sense of "space". The 660s2 bass is better, period. Everything else is just as good as the overpriced 800S. The 660S2 are the flagship of the 600 series, and totally outperform my HD600 and the 650. They made me sell off my 800S.
Yes and No. 109 PRO are stronger in the bass and brighter in the treble...they could be hot sounding with wrong equipment. HD660 S2 are more linear and not as spicy, although not as technical, accurate and clean as 109 PRO. Here is my graph comparing them both: imgur.com/a/iQtGEcT
Thanks for the review. I’d definitely prefer the HD660S2 from the graphs you provided. A few reviewers had commented that there is some strange sub bass stuff going on, and the treble is hot on the Meze 109 Pro. I have HD600 and HD650, and now I’m going to buy these new 660S2. I’m not a fan of HiFiman headphones as the are made in China and their QA has always been suspect, and the on,y have a 1 year warranty vs a 2 year warranty on Sennheiser. I’ve been a Sennheiser user for 45 years, and I’ve owned more than 10 different models and have never had an issue.
If EQ'd to Harman would you expect these to have meaningfully punchier and clearer bass than the older versions with the same EQ? Sounds like it and if so then these are a wonderful addition to the line.
I have to admit that these have piqued my interest & I’m tempted. But the reality is that I don’t need them. I already have enough headphones in the sub 1k range that offer different perspectives on sonic reproduction. I expect Sennheiser headphones to offer good value. At $600, I expect the 660S2 to compete against headphones up to $1000. With that in mind, I’ll wait until I hear how they stand up to the 109, the Noire, the XS, the Ananda and others in the price range. To be honest, I kinda wished they had brought back an improved 700 Series headphone. There’s a glaring gap in their price range that needs to be filled!
Mine showed up today. It's not worth it at $600 considering its the same molds as the other 600 series and the box is even cheaper for them to pack now without the the hardshell casing. $400 at launch would've been more sensible.
thanks for the great review. I'll have to demo these when they arrive at stores but it looks like it isn't really going to replace my hd660s which I've been using as my all rounder headphone. more detail and more resolving sounds great but if it's only a step between hd650 and hd800, I don't really have a place for these. I'll have to see
Recently purchased a pair of hd600's and although they sound great i do find them a little bit shouty and somewhat fatiguing as i'm pretty sensitive to the higher frequencies. I was considering selling them and replacing them with the 650s but now unsure weather to go for these instead. Would you recommend the 660s2 over the 650?
@@Nath-rg2qd The sound on the HD660s2 is really impressive. The bass does go down to lower actives. The bass is not necessary louder but it goes down to lower frequencies and you can hear the instruments. You can hear the buzz from the guitar amp. Much more detail and not in your face highs. More relaxed. Good for rock. Ipad - Amazon Music HD Jeff Beck Wired 360 Wired. Using a Tube Quad PA-one DAC. You really hear much more detail and the sound is much more full than the HD600. The clamping force on the headphone is a bit strong. Hope it loosens up.
Great review! I hadn't stumbled upon this channel before, but I was very impressed by your analysis! I subbed and will be checking out some more of your content 🤘
The sound on the HD660s2 is really impressive. The bass does go down to lower actives. The bass is not necessary louder but it goes down to lower frequencies and you can hear the instruments. You can hear the buzz from the guitar amp. Much more detail and not in your face highs. More relaxed. Good for rock. Ipad - Amazon Music HD Jeff Beck Wired 360 Wired. Using a Tube Quad PA-one DAC. You really hear much more detail and the sound is much more full than the HD600. The clamping force on the headphone is a bit strong. Hope it loosens up.
Thank you! I too own a many headphones, 6 of them being Sennheisers. I never bought the original HD660 S. I think, however, I’m going to have to buy these HD660 S2! Thank you again! 🙏🏽🎶❤️🔥‼️
HD 660S2.. I have the Ananda and a HD 660 S. I usually run with the Ananda but just recently went back to HD 660 S my wife use and out of my collection she prefers... I maybe was blind to how weak and thin the mids sounded on my Ananda.. Mid frequencies are probably one of the most important frequencies for music and I'm now considering selling my Ananda and HD 600 to grab a HD 660 S2. I'd say grab the HD 660S2... But if you need sound stage save some money and go with a Hifiman Arya if you can afford it. But I bet the HD 660S2 have a smoother frequency response than the Arya. I used to want more detail..and the Ananda gave me that but I lost the smoothness the HD 660 S provided to my ears...
Yes, the S2 uses the Sabre ESS DAC. This is a clinical sterial sounding DAC. I prefer the Bur Brown DAC. Has a more rounded sound without the ragged edges that the ESS generates.
I purchased the 660s in 2017 when it came out, It always lacked sub bass and I think this is what the 660s should have been released as, but they underestimated Hifiman when they released the Sundara in 2018. Do you think these are worth getting over the 660s?
I have Sundara they are amazing but not better than my 660s. Yes they have more low end and soundstage but everything else is better on 660s. Also 660s can EQ easy
@@TheColorization Yeah i have all the HD 6 line and 5 line , HD 660s are my favorite Headphones from all line , that doesnt mean that i dont like the others :). I will talk to Ichos a friend reviewer from Greece so maybe he could find me S2 pair . I will buy them for sure . But honestly i dont get all that hype about some db more on Low End , for example I Have Sundara that have more db on low end that i like but overall tonality is better on HD660s . And every time i EQ my HD660s giving them some DB more on Low End at first it feels WOW but after listening ang Listening mostly at night without any outside noise i turn off the EQ because they Sound to me more relaxed more natural without that boos on Low End, So If S2 have manage to have the Character of HD660s and that vocals with a little bit of more low end , then ok that would be great.
@@TheColorization HD660s already have really good imaging and separation and dynamics even compared to my Focal Clear MG and Sundara, So i really cant imagine that HD660S2 have better imaging and speed and if thats true honestly i dont expect something more than 10% better , it would not be like going from HD650 to 660s speed and imaging. But I dont have S2 to know so i have to wait for them to come to Greece , until now No Store have them and Sennheiser that i contact doesnt also have them in my Country . I will wait .
Hi , great interesting video, I have 660s with a thicker ear pad which helps a bit with bass, but I have 6xx with custom cans bass mod, which does help at the lower end , however with my new 660s2 with the thicker 1.25” pads they do sound great in the bass , but my 6xx moded sound very similar to the 660s2, but yes definitely more bass than 660s. Regards mark
If I was in the market for another pair of headphones, this would be on my list. I use my HD6xx daily at work, and I think they're a decent all-round headphone. Comfortable, easy to listen to, if a bit veiled and a bit less detailed. I've really wanted to own a pair of HD600, but I just haven't convinced myself that I need to buy them because I've been satisfied with my 6xx for daily use. At home, I'll use PC37x or 38x for gaming, or my LCD-X (2021) for music. My wife also has a pair of HD6xx for use at work. Guess we like Sennheiser, eh? 😅 FYI - your music in the opening is realllly loud!
I have a similar dilemma. I use my 6XX daily and absolutely love them slightly EQ'd for more treble. I really want an HD 600 but now it seems the HD 660S2 might be a "better" option. What should I buy?! Should I buy both or none?! LOL.
Sucks about the soundstage. I always prefer wide open soundstage. The reason is I use headphones for games and movies. So I want the big open wide sound. To make it sound like you're IN the game or movie. Not a claustrophobic in your head sound. I get that is more preferrable for music. But it sucks I want the better bass and the resolving sound. But it is always got to be something. Ugh!
I like the 560s better than the 660s. My 600 is my favorite. My 6xx needs eq, less mid bass (- 3db at 200hz) and a slight treble boost (+ 2db 6500hz) and a 3 db low shelf at 80 hz. After that it sounds excellent
I noticed that also and make a comment. The sound in the video is terrible. Funny coming form someone that is reviewing high end headphones. A lot of people just can not hear very well and do not care how things sound. I am a little strange in that I am very sensitive to how things sound. When I review the headphones, I will let you know who they sound. I will pair it to my tube DAC and my dragonfly portable dac from my Iphone - If it can drive it.
660s were not a match to 650 or 600. If you know real, live music and instruments it was a downgrade in 600 lineup. I owed 4 different 660s and usually selling them in a matter of days, keeping 650. Let me try these and I will let you know if it can replace 650. Thanks for review as always, you bring best and newest ahead of other guys. Salud
Meh, sounds like more of the same. They read like they sound too laid back to replace anything in my lineup. Maybe in another 19 years they'll figure out how to give us the best of the 600 & 800 series.
The word "slightly" was used too much for me to spend $600 on a pair of headphones that are "slightly this" and "slightly that". Maybe a Black Friday deal but for now, thank you for a great review and for saving me a fair amount of cash. I'm sure I will get a pair just not right now.
Man...I thought this channel is from a slavic country not Romania. You need to work on your english accent. I have the 1st 660 and will keep and enjoy them while they last. The best sound signature for me. Hai noroc.
