dalethorn 0 Report post Posted May 13, 2014 This tiny headphone amp might raise a few eyebrows for how much it costs, but the sound quality is in line with the $500 USD price. http://www.hifiheadphones.co.uk/forum/headphone-reviews/4080-portaphile-micro-portable-headphone-amp-review.html Share this post Link to post Share on other sites