I have had the 668B for like a year now I think. I use them mainly with my PC. They're quite neutral, the bass is subtle and quick, doesn't bleed. The highs are nice and crispy and the midrange is present. Overall very balanced headphones. As someone said before, they are harder to drive than most other headphones. To get them reasonably loud I need to set my volume to around 80 out of 120 (Fiio X3II low gain mode) whilst all my iems are already loud at around 60 volume.
A'ight! Isolation isn't a big deal, but I was used to it. There only was a handful of models I found that had full isolation. Everything's a matter of being used of, I'll just get used to the new design I guess. Thanks for the info!
I gave the HD668B and the HD681 a few hours burn-in this morning and a quick run through this afternoon. If I were picking one over the other, I'd pick the 668s over the 681. To my ears, the 668s have more controlled bass, are more detailed, and have better instrument separation - and I found myself "desk dancing" more with the 668s, so that's a PRaT win too
The isolation is not great on either phone and sound leakage is significant on both. I had read a review which suggested that you could use the 668s in a library at reasonable listening levels. I can only say that my definition of a reasonable listening level is clearly very different to that reviewer's. I had planned to use one of these headsets in my office but I don't think I'll be able to do that without getting lynched by the guy at the next desk!
Another factor to bear in mind is that both headphones seem to induce sweating rather easily, a hitherto unforeseen problem given the advancing summer. I've got some velour pads to pimp these headsets with but haven't had time to see how they affect either sound or the heat issue.
However, to put the above into context, the HD668s cost €29 and the 681s €19 (plus €10 shipping) and they are both very much worth their purchase price.
I just did some brief AB'ing between the 668s, my Sennheiser HD205s and Sony MDR-570s, which are both good performers within this price bracket, as well as (just for giggles) my VE Monks. I prefer the sound of the 668s over and above all of the others.
Not a gamer so I'd never heard the Skyrim music. Very very nice. Used the YouTube search plug in in foobar2000 to play it through my Schiit/Senn setup. Thank you
Moved to the full soundtrack which I'm playing now. https://youtu.be/QTZiyF_Bki0
I am a gamer but there are few game soundtracks which stand apart as genuine musical works, the Skyrim soundtrack is one such - and is available for purchase from directsong and itunes:
https://www.directsong.com/mobile/productdetails.php?productid=2241
If you liked the Skyrim OST, I can heartily recommend the soundtrack for another game called "Brothers: A Tale of Two Sons". The soundtrack is simply beautiful, available on youtube here:
https://www.youtube.com/watch?v=HQQRZFueIs0 and hi-rez downloads available for a paltry $5 here:
https://overkillsoundtracks.bandcamp.com/album/brothers-a-tale-of-two-sons-official-soundtrack