Many decades ago, Sony has a big reputation in audio and video system. A guy like me who live in 90's know really well how expensive and premium Sony really was. The good sounding Sony is not without any reason; they make their reputation in audio quality far beyond any competitor was think about it. It is proven when on my hand right now, I have Sony DAS-702 ES, the first DAC built by Sony in 1985. Yes, at that era where CD hits the market, replacing the vinyl records, everyone starts to aware about this new audio technology. Imagine where this CD technology just penetrates the market, Sony was not satisfed with the DAC built-in the most of CD player, so they start making a separate DAC unit. Especially for the marked with ES logo that have the meaning Elevated Standard , or above the standard, built by cost-no-object in the Sony engineering division. Let's take a look!