DAC real specs are kept in secret by manufacturers. Because it's not only the brand but also the model. Can easily be 5$ difference per channel between cheap-o and state-of-the-art. So guess where they sometimes save...
Only way to be sure is to dismount and look. But then you might have problems with guarantee repair. Sometimes "modders" report on DACs in forums, but I haven't seen anything on this particular player.
Burr Brown has a good reputation but there are others too.
