Nuraphones?

I own a pair of these.  

Here is my take on these headphones.  I will assume you have read at least the marketing and features.

The setting up of the hearing profile requires you adjust the headphones on your ears until it detects a proper seal.  The seal never did occur on my right ear so I had to continue without it.  I must of tried for 45 minutes.  Despite this, the process continues by measuring your ears response to a bunch of tones.  After a couple minutes, it comes to a conclusion.  At the conclusion is plays a song and presents you the option to play with and without your profile.  This is a gimmick.  Not even $5 headphones sound that bad (without your profile).

With your profile on, the headphones do sound quite good.  There is a immersive mode that applies the bass and the physical sensation (vibrations) aligned with the bass notes.  Getting this setting right does produce a full and enriched low end and a feeling of "Bass".  Its pretty cool. 

The headphones sound good in wireless mode, however try plugging them into wired into your MAC or PC.  This seems to enable the equivalent of the loudness button found on vintage equipment.  

The headphones seem comfortable at first.  But after awhile, maybe 1 or 2 hours, my ears start sweating and it does start to feel like someone has stuck there wet pinky finger in your inner ear.  The silicon outer cushion creates too much seal and does not allow any breathing.  

I like the sound!  So I wear them for an hour and then switch to something else.  

Yes, I was one of their Kickstarter startup investors.

I am not a big headphone user, but for my main system have a pair of Sennheiser HD800's, about four times the cost of the Nuraphones, but was interested in supporting their work to tailor the response of the headphones to one's ears.

I received the phones from the first shipment to U.S. investors, downloaded the app to my Android phone, paired it with the smartphone and ran the process to adjust the headphones to my ears...and I must say, these are quite a good set of headphones for $400.  They certainly are not in the same league as my Sennheisers, but very much worth the price!  I would especially recommend them to people who stream music from their smartphone.