Classified, iPod 5g, and Portaphile Micro. All that's missing is the Audeze LCD-X Headfonia: Portaphile Micro review March 28, 2014 At long last, I got Headfonia to publish my review of the inspiring Portaphile Micro headphone amp. While no amp comes sans niggles, Portaphile Micro's few (but hefty) niggles are part of a package that is entirely worthwhile. I didn’t expect Micro to positively bump me so well. But it truly is an excellently engineered amp. The 627x has actually become my new bench mark among all-in-one battery-powered headphone amps. But the Micro isn’t far behind. It certainly pairs better with IEMs. It is light, well-made, and compact. It also costs less than the 627x or the Vorzüge, and for the most part, is able to match the performance of either. Yes, battery life is a pain, and yes, you have to ice down your dip stick from time to time, but I think it is worth it.And if you own Audeze’ awesome LCD-X, it is so damn worth it.