Will a new Dac improve the sound?

I believe yes! DAC’s change the sound for better or worse. Cannot deny by introducing a new component that differences will appear. I like my Naim nDAC It’s loaded up with great sound and functionality. 4 optical, 2 RCA, 2 BNC and 2 USB A inputs. It can charge also your phone :-) Plays all formats even Apple losless. Massive power supply and I just ordered an XPS power supply for it. The current interior DAC Transformer has three stiff power rails. It will handle the front digital aspects. The XPS Power Supply brings 6 quiet stiff DC rails and provide6 stiff power rails of DC to the quiet analogzecrion. Auditioning Power cables soon and learning abot the "Burndy" cable.

There is an nDAC listed on Audiogon. Burr Brown 1740K DAC chips. Naim has purchased the remaining stock of the chips to be able to continue to service a repair their $20,000 CD555 and matching PS 555 DR Power supply for the future. The same Burr Brown chip-set in the CD555 are shared the nDAC making it a very formidable piece and still serviceable. The nDAC can be upgraded by using Naim power Cables and different and more powerful and expensive power supplies. Naim has researched and listened to customer feedback and guaged the performance atbeach level. The nDAC sound bad ass without the additional power supplies and many folks are satisfied with its performance especially when using Naim’s high quality DIN Cables.