I reviewed this DAC as part of a combined exaSound e22/e20 review. Instead of just duplicating that review here, I will provide a link to it:
http://www.head-fi.org/products/exasound-e22-dac/reviews/11541
Hopefully this isn't breaking any rules.
http://www.head-fi.org/products/exasound-e22-dac/reviews/11541
Hopefully this isn't breaking any rules.