Ok well here are some early first impressions on the Lyr. Out of the box, I'm very impressed. I'm going to try and stay reserved until the amp has been fully burned in (only have about 2 hours of play time on it so far). But man, the power this thing puts out. I did not expect such a difference with my HD650 between the PS Audio GCHA and the Lyr. Don't get me wrong, the GCHA has its strengths; but the Lyr just seems to be breathing new life into these headphones. I think the problem with the GCHA matched with the HD650 is that the GCHA is a tad rolled off in the treble. That would be great for certain headphones, but the HD650s are already warm sounding headphones.
I'll post more impressions later after both the Lyr and my ears have burned in.
On a side note, I've got a pair of T1's on the way to try out with this amp. Should be an interesting time.