I thought it was in this thread, but apparently it was in another where a user suggested that the Ragnarok is not capable of driving the HE-1000. I'll have to check back there to see what they were referring to. But their second suggestion was the Jotunheim would be less capable than Ragnarok in driving the HE-1000. I find this to be completely false.
Background thoughts out the way, this is a supreme amplifier! Everyone speaks of the proverbial wire with a gain - this is not that. But it seems to dispense with the formalities, the normal lets get to know the headphone, which all other amplifiers I've encountered do. The first headphone I tried was HD650, because it is the first headphone I almost always try. The next headphone was HE-1000, and the difference was not a lot. Not like with most amplifiers how much of a gain there is jumping from $300 to $3000 transducers. The amplifier simply said, move out of the way - because I am coming through.
And that was indeed the second reason I did not post yesterday upon receiving and first listening to this beast. On both ends, source and output, the amplifier did what it was told to do and did not make excuses. This, I think, is the first time I'm truly hearing my source, being the Mimby, which is traditionally in a Modi/Magni stack. Output instead into the Jodie, I hear what the Mimby is. It is kind of a ruthless source, with a little more stuff happening in the upper registers than I personally like. I was fearing that this amplifier was bright. Not the case! When I changed to my Chord Mojo for source, I heard nothing harsh in the upper registers.
For those who don't like to read too much - this amplifier plays. It plays irregardless of the thing it is playing into. And it plays straight to the core of the source. If your source is harsh, your output is harsh. If your source is clean, your output is clean. I will eventually pop over to the Rag, but at this moment, I do not feel the need. If you want to hear what your source sounds like, and you don't want to buy an amplifier for every headphone, give the Jodie a try!