Had a fun morning of listening on the HD650 comparing my Little Dot MkIII (Voshkod Gold Grid tubes) and a Graham Slee Solo SGRII with PSU. Both amps are fed by a Rega DAC.
I was mainly into IEMs (Shure 535se, UE Triple.Fi.10, Sennheiser IE80). But I'm so glad I bought the HD650 for home use. It really makes music listening such a joy and almost an addiction. The details and soundstage are really good. And it does react to its source equipement.
I'm also very impressed with the LD MkIII. It's such an inexpensive amp. And to my ears (with the Voshkod tubes), it has a much more detailed and energetic sound to the Graham Slee Solo SGRII. I was expecting really great things from the Solo, seeing that it is nearly triple (with the PSU) the price if the MkIII. I've had the Solo now for about 3 weeks, and the MkIII keeps on impressing,
I'm curious to hear the HD650 with the Schiit Lyr that gets high prise in this thread. I have tried the 650 with an ALO Pan Am, which I really liked.
Go for it! I have the LD MKIV and the Lyr. You will not regret the purchase. Those moments when you want to energize yourself at the very instant, plug to the Lyr. At times when you do not care about "audiophile" thoughts and just listen to feed your soul, plug in to the LD. Okay, maybe not that drastic of a situation but you know what I mean? When you dialed in to your content the tubes for both the LD and the Lyr, browsing this forum becomes less and less frequent ha,ha! Good luck!