After reading many impressions of the Headamp GS-1, I wondered if it was prudent to order a pair of HD650 "just in case", as the GS-1 is sometimes described as cold and analytical. To the contrary I'm finding the HD600 pairs very well with the GS-1, with a good balance of warmth, and a sweet midrange. In reference to the latter a well recorded piano has the slight sense of lushness one might expect, and the same could be said for many other instruments such as the oboe, saxophone, and dobro guitar. The GS-1 has also increased detail and overall clarity and air.
But then again such results should not have been a surprise, as the current graph still shows what used to be called a mid-bass hump extending well into the lower mids, and a nice sweet spot in the mids itself.
Edited by pigmode - 9/6/11 at 4:01pm