Ok my story. It's been a while since I received my build of the KGSSHV. Built by headinclouds it was an offboard 10mA 1800V. It was a exceptional experience working with Geoff (headinclouds) to get this build completed to my requirement. To the standard build we have added a 41 steps attenuator (credit to paradoxper for the idea) and Furutech XLR and mains sockets. Whether or not the later made any difference I don't know, but they seem to be quality built.
I had a good impression on the KGSSHV sound on my own headphones from previous listening. The initial impression after burn-in was right on par with my original experience. The KGSSHV is an amazing technically sounding amplifier, with great PRAT, detail and speed. However, having heard a few things here and there, I told Geoff something was yet missing. Yes I admit, I am a bit of an ass, I was so lucky in the first place to have found someone to build me a top spec KGSSHV and to my specific requirement.
So here's where the story goes a few months later. A few modifications, and most importantly since we have some good cooling capacity here, a 14mA current KGSSHV.
I was expecting an improvement I will admit to that. It only has a couple of days burn-in, but I only needed about a few seconds to tell this is now a completely different animal. Before posting complete impressions I would like to allow it to settle to a complete run-in, but it is the best I have ever heard the Stax headphones yet. Organic, effortless, holographic, yet very detailed and fast. That thing that made the KGSSHV just a bit sterile is completely gone now.
Edited by negura - 4/14/14 at 5:33pm