my other headphones are beyer dt990 so my expectations for comfort and build are quite high, and im quite resistant to higher end of frequency range. im running both headphones unamped, dt from mid class motherboard and listen from work pc.
Build seems really solid, people looking for solid headphones below 200$ should look at these. they seem durable and well built. Clamp is quite strong so people should be careful though it does bring good isolation and should keep on your head even doing sports. wire is nice, though its short and has mic and control thing in it. if anybody from focal reads this - ADD FFN 2m SIMPLE WIRE ALONG WITH THAT MOBILE WIRE
they are comfortable as long as you have medium or small head/ears, for large ears cups might be too small - they are a bit wider and shorter than sennheiser hd419, but are quite deep and have memory foam. the cups move in all directions, they are fastened to headband like I=C where I is headband, = is a thing that rotates a bit, and moves in all directions and C is cup, so you should be able to get seal. i have medium ears and glasses and still they seal well. though cups should be larger, now if they ad height of beyer cups i would ruin my pants cause of comfort, but its ok now. when i got them i wore them all day for 2 days in a row, clamp was and issue(it gets better with stretching/wear), but comfort was decent, they got warm, but nothing extreme. could use ability to fold flat like m50, but that would probably affect durability
i have some 30~40 hours on them so they might still change their sound a bit, but from other reviews they seem to get better
listen sound have something magic about it - its smooth, rich and intimate but im not used to describing sound so i cant tell what it is exactly, seems to be excellent for some music - like old music from fallout games, Sinatra etc., but not well suited for movies and music that calls for epic scale or wide, epic feeling or roughness(like some metal genres) - it seems to lack breath compared to dt990, it might be too smooth for some music that calls for some grain. dt990 is open and so it might be because of listens being closed, i cant do a to b comparison as i have dt990 at home and listens at work.
i quite like them as addition to dt990 as they compliment each other nicely compensating for others weakness
bass - nice, punchy, not overpowering, i would say it goes deeper than dt990, but is a bit below in mid bass, they are not a basshead headphones
mids - much closer and better, lacks feeling of breath though, cant explain it better - you hear the sound, but dont feel the artist breathing, its a bit of a problem on movies when spoken text feels a bit lifeless
treble - it seems to have some spike somewhere, cymbals sometimes seem sibilant and a bit too loud, but its quite narrow spike, else its nice, not overpowering and not tiring(i use dt990 without eq so be careful if you are treble sensitive)
TL;DR
overall i love them, while they might not be universal and lack for some music, if it fits your music they are epic, certainly worth considering for anybody looking for closed headphones below 200$. especially since they offer something no other headphone in this price category offers - decent comfort, easy to drive, sounds great, good isolation and solid, durable build, all other headphones seem to lack at least one of these.
i would give them 4.5/5 stars taking points away for cups that might be bigger and lack of normal cable without mic and controls. for sound i would like feeling breath on spoken text(i cant describe it better - it feels nice, but you dont feel as if the person talking is creating it by breathing out, you dont hear the air, hard to describe it), its mostly an issue with movies where speech feels a bit artificial, else its great, for 200EUR, for 108 they are a worthy buy, if nothing else then as great mobile headphones
hope this makes sense as english is my 2nd language and ive had a few beers