HD650 used to be the headphone to get. Everyone seem to have one at one point or another. I have heard on various occassion and I am quite familiar with the sound signature. However I have not own one, I had always planned to get one, however throughout all these time, I never got around to do it for one reason or another.
Recently, I considered getting it again. However again I ended up with something else, the HE-500. I compared them, along with LCD-2, the two orthos sounded better by a significant margin to me, which made sense considering they also cost more.
There is something that I have always been wondering all these years, I kept hearing people saying these scales well. What exactly is this? Does this still hold true in the the age of thousand dollars headphone? And by it "scales well", does it mean that it improves a whole lot by driving it balanced? Or simply high end equipment in general?
Although I consider myself rather familiar with its sound, I've not heard them with really high end equipments (the best being out of Naim DAC and Beyerdynamic A1 headphone amp), and of course, I have not heard any of the "magic" that is being described.
Is it still worth building a system with the HD650? I don't plan on going balance though. FWIW, I also prefered HD600 over HD650 with the Naim DAC and Beyerdynamic A1 headphone amp.
With Rega DAC and Beta 22 (3 channel), the HE-500 sounded good to me. However, sometimes orthos in general gave me the feeling that fine details are being smoothed over.