I ran a DAC r for a couple of years into my 552 but fed from a Core via coax but I never tried the USB input. It acquitted itself surprisingly well in such company but cable choice had a big influence, the sound could be rather bland with some I tried (an SDI 12G beat two chord digital cables by a large margin). From a computer via USB ???
A (multibit) Schiit DAC could fit the bill. Have a look at Bifrost or Gungnir. They are supposed to have a good (Gen 5) USB implementation and pretty good performance for the money.
I haven’t heard one myself, so I am afraid I cannot provide any first-hand feedback! Happy with my (second-hand) nDAC, but of course no USB-A on that one.
I was thinking that a V1 would be ideal, as this has a USB input, and was developed specifically to for use with a computer. There are good deals to be had on NDACs now that they are discontinued. All more expensive that a DAC-R, though.
The V1 does have a preamp enabling you to use if with just a power amp if you prefer, but you can also use it as a DAC into a preamp or integrated. In the Naim world, there can often be redundancy, but my view is that it’s best just to ignore this and judge the product as you wish to use it, against other options within your budget.
As long as a DAC has a regular line out, you can use it into the SN2 as normal. If it also has a pre out, digital or analogue volume control, just ignore it.
I have a Dac-r in study system. Largely used for streaming from digital output of Chromecast, runs into a 30 year old Ion Obelisk and then a pair of Neat Iotas.
I think this set up is marvellous and initially no-one who visits can quite believe the lovely sound this ‘back room’ system produces.
I had a Rega DAC R for 3 years. I used it with my Nait 5i and a Mac Mini to feed it files by USB. I liked it very much. Smooth with nice PRaT, easy on the ears. I only sold it when I upgraded to an ND5 XS. For its price, the Rega DAC R is great.
Hi - you live in the US, for the money you’ll pay for a Rega dac (which, imo, is unexceptional anyway) you could get a much better (imo, again) Schiit.
I strongly preferred the Chord Mojo to the Rega DAC-R. It also took up less space and cost a lot less money. The V-1 was pretty good but lacked a good bit of the Naim signature sound (for my taste) and cost way too much money given its performance. Now, if you could find a used Chord Qutest within your budget that would easily be the way to go.