“The D3 is refined, dynamic, and highly transparent, and bass prowess is impressive. Detail and resolution took a hike, dynamic contrasts fell flat, and bass oomph slackened. Once you hear the difference you’ll never want to plug headphones directly into a computer again. I next compared the D3 with AudioQuest’s DragonFly USB digital converter/headphone amp. The DragonFly is certainly decent, but the D3 sounds more transparent and effortless. After spending time with the D3, the DragonFly’s sound seemed coarser and more opaque.” —— cnet.com