This is Beyerdynamic's OEM of the AK10 - it definitely offers more detail than any standard headphone amp I have, including the $375 USD Decware Zen Head.
http://www.hifiheadphones.co.uk/for...erdynamic-a200p-dac-headphone-amp-review.html
http://www.hifiheadphones.co.uk/for...erdynamic-a200p-dac-headphone-amp-review.html