All-in-one DAC/Amp for 500? Correction – make it 398. Well, what is the HUD-DX1? Made by Korean audio company Audinst, the HUD-DX1 currently represents the pinnacle of the Audinst DAC/Amp development tree. It’s just about packed everything possible into its rather small 104 x 120 mm industrial metal enclosure –including the latest (and depending on who you ask, the greatest) means of playback. Yes, native DSD/DXD. Let’s not also forget the list of other fairly impressive features and components. But wait you say–it’s more than twice the price of the original MX1! And here is where I do apologize. I’ve never had the opportunity to try the HUD-MX1 or MX2, so I can’t say with certainty how much of an improvement it is over these older models. But it is an opportunity to look at the HUD-DX1 from an independent perspective.