some info http://hifi-advice.com/mad-scientist-review.html

"Before Bob sent me these little jewels, the best I had heard this reproduced were with two awesomely expensive rigs, one built around the R-10 and one around the SR-009.  The R-10 rig was warmer and rounder, the SR-009 more lit up and technical.  Placing the Can Openers on top of my HE-300 cups did both sounds simultaneously.  I didn't long for either top notch can, as mine had been properly opened.  Neither wallet crushing statement headphone attracted my attention further.  Sure the R-10 might have more natural tone, and the SR-009 might separate images better, but just.  They don't blow my enhanced rig away, nor do they put any quality of my system into a far lower league.  Given the chance to own a sound signature between the three, regardless of cost or pride of ownership, I'd choose mine every day of the week.  How's them apples!

- An anonymous self-professed headphone nut who owns more than 12 pairs -"