Pnatom's DAC

[ogs]

Unfortunately nobody will be able to give you an answer to that. In the specification Devialet tells us "Devialet DAC embedded in Devialet intelligence Processor". So the DAC is designed in-house  and not available for other designers to use. It is probably very good. What we do know is that Phantoms sound excellent, but depends - like any decent speaker - to be placed properly for top results. Also, and here I disagree with Devialet, stereo is necessary minimum. A single Phantom can not reproduce music good enough.

Thank you very much for the reply, i am planning to buy another Phantom to play stereo sound , so what is the minimum distance we keep them apart for best results?

Depends on how far away you sit from the speakers (or where you normally listen to music) Less than 1.5 meters may be too close, but the most important would be a symmetrical placement in the room. They say that a equal sided triangle is a good setup, i.e. 2 meters between speakers equals 2 meters from a speaker to your ear. I tend to end up with less between speakers than listening distance. Presently 1.9 meters between speakers (middle of front) and a little under 3 meters from speakers.
Bass is most influenced by room interaction so symmetrical means approaching same distance from walls and also the same (identical) distance from a listening position to each speaker.
Every room is different so moving speakers around will be helpful in determining a good position. If you do not get a result you like you need to educate yourself.  You'll find books and videos that talk about the room/speaker problem. Good luck!