@zipiv I kind of feel like it's the DAC but it's hard to say for sure. When I had the DSJr I ran it through a Marantz receiver as a preamp and that combo sounded way better than the NAD. Obviously a Marantz receiver isn't going to be the greatest preamp either but it was still no contest.
The DSJr was just discontinued recently. You can still get to it on the PS Audio website but there is no button to buy one. There is also a forum post saying they will be redesigning it and re-releasing a new DSJr in the future, but that will be after the cost-no-object super DAC they are working on so I wouldn't hold your breath.
I use Roon but you can run Tidal to the DSJr using the free MConnect app from a phone/tablet so you don't really need BluOS for that.
If you are happy with your tube preamp and going to hold onto it, I would look at something else other than the C658. I don't know what your budget is but the PS Audio was far superior as a streamer/DAC (far more expensive too). I've seen some people post that the NAD doesn't really sound any better than a Node 2i if using both as just streamer/DACs. You can get one of those for 1/3rd the price and pair it with your nice preamp. Again, the caveat being Dirac could change everything...
The DSJr was just discontinued recently. You can still get to it on the PS Audio website but there is no button to buy one. There is also a forum post saying they will be redesigning it and re-releasing a new DSJr in the future, but that will be after the cost-no-object super DAC they are working on so I wouldn't hold your breath.
I use Roon but you can run Tidal to the DSJr using the free MConnect app from a phone/tablet so you don't really need BluOS for that.
If you are happy with your tube preamp and going to hold onto it, I would look at something else other than the C658. I don't know what your budget is but the PS Audio was far superior as a streamer/DAC (far more expensive too). I've seen some people post that the NAD doesn't really sound any better than a Node 2i if using both as just streamer/DACs. You can get one of those for 1/3rd the price and pair it with your nice preamp. Again, the caveat being Dirac could change everything...