My guess is the ESS saber dacs and the transformer. One thing to keep in mind Syntax is that this is an EXTREMELY good value but keep in mind the usual cavaets, YMMV. When I compare this unit to my TT set-up (Oracle/SME/Benz LO) it really does hold its own in several areas of performance especially resolving ambient information, really exceptional in this regard. To me this unit was a hedge bet, I wasn't sure if it would be satisfactory in its stock form; I needed a new transport in any case so it could be used for that plus all the other bonuses that are of little interest to me now but may come into play later. I was looking for a relatively cheap CD/SACD unit that has the platform for significant upgrading, I know how modifications can be a great route to go to another level without breaking the bank account along the way. Worse case scenero, I sell it and lose a few hundred bucks, it really is a no brainer, you need to hear this unit for yourself. Notice all the 83SE's for sale, wonder why? :)
I was listening last night to the Arthur Rubinstein SACD remasterings of the Chopin Ballades and Scherzos and was absolutely stunned at how superb this unit performed, capturing the performance to such a remarkable degree with much of the subtle nuance I hear on the vinyl recordings. No it doesn't get the tonality in the same way but it still is amazing to me that digital can be this good at this price point.
I was listening last night to the Arthur Rubinstein SACD remasterings of the Chopin Ballades and Scherzos and was absolutely stunned at how superb this unit performed, capturing the performance to such a remarkable degree with much of the subtle nuance I hear on the vinyl recordings. No it doesn't get the tonality in the same way but it still is amazing to me that digital can be this good at this price point.