Here is the Mr Speakers site [http://goo.gl/wUw2Oz] and here are the stock Fostex T50RP that these are based off of [http://amzn.to/1xefQbv] so you can see the physical differences.
Link to the Sound Demo http://youtu.be/yvL46oq8tUU (which I think only scratches the surface of what these do.)
The amp/dac setup is as follows.
JDS Labs Odac [http://goo.gl/JkpJAx] or [http://amzn.to/1oXRmla]
FiiO E09K [http://amzn.to/1yMv1H9]
Here is that 1/4″ to 3.5mm extension [http://amzn.to/11mGceF]