While I have a hard time recommending the ergonomics of these earphones, the Stainless steel version (800$) is a very expensive, very good sounding earphone. And it is made well. Nothing is perfect. Balancing 22g inside the ear is hard and any sudden movement will dislodge it. The cable is nylon coated, but much, much better than typical nylon cables ala Maximo and Zagg.
But, there is not a better, more natural sound I have heard among dynamics. It is fast despite the massive 16 mm driver. One thing which Final have really hit is echo perfection. I can describe it in no other way at the moment as it is too early for a real review. But, I am considering that this earphone could actually be a replacement for home headphones. Yes, it is annoying to wear, and harder to drive for many reasons: @ 16 ohms and 108 db, it hisses with many sources, but it is so natural. Some portables will have a hard time providing enough bass for it, but if they can, it really is top.
While its price really dictates that the earphone should perform well, I am glad to say it does. It is annoying to use and is not good for outside ever - at all. But, it has a lot going for it. If it ends up performing well with an impedance adapter, it may be the earphone that puts my some of my favourite headphones to rest. Of course, it doesn't engage the outer ear, and positioning is hard. It is cold in the winter.
But, its echo is nigh on perfection. A review will come later, or at least a close look at it. Anyway, while perhaps too expensive, I can see the market for it for those who must have the best materials and a sound which commands the price. It is far more natural than the IE8 and about 2x the price. It hasn't a sonic problem.
Bass isn't as heavy as some other earphones, that is for sure. Treble and mids are sharp, clean, but have very sonorous echos which make vocals beautiful. Again, I prefer the Steel version to the top end brass version which is probably best for a limited range of music as it is hot: treble and mids are warbly, too excited (free of sibilance or grain) for fast music.
Very, very recommended, but very very confusing product. I wish they would make a lighter version which was less expensive. The model below the Steel version I have not heard, but may in March get the chance. The Steel one, is simply incredible.