Originally Posted by StanD
You didn't answer my question nor did you take notice of the fact what I said about too much power can hurt your hearing and damage your HE-500's. There is nothing to be gained.
Ooops, let me slow down and answer your questions. No, I don't think the HE-500 needs that much power which is why I mentioned the fact that people are using resistors in-line which reduces the power to the headphones and allows more effective use of the volume knob. I think that answers your first two questions. Of course no one wants to destroy their headphones or their hearing. If you want learn more about how people are using the Mini-X for headphones (or not) and what they think of the sound, you could start with the thread that I referenced earlier: http://www.head-fi.org/t/629352/he-500-lcd2-d5000-dt770-sr80-on-a-speaker-amp-emotiva-mini-x-a-100-project/3255#post_10278665
As far as what makes it sound better, I can't tell you. I can only go by what I've heard from other hi-fiers since I haven't tried it myself. As ben_r mentioned, it's a good value proposition and, according to some head-fiers the SQ is better than other more expensive amplifiers such as Lyr, etc.. But, of course, it's up to everyone to judge for themselves and not everyone would necessarily agree obviously. Although I have a Mini-X, I have yet to do the 1/4 TRS mod. and get a pair of HE-500's to plug into it. But, once I do I will let you know.