So here's what I think I know about NAGRA. The HD PreAmp is fantastic. It obviously bested my AESTHETIX Callisto Eclipse recently, although the Callisto Eclipse's tubes are a bit long in the tooth. Nonetheless, the Aesthetix Callisto was the best pre amp I ever heard before this Swiss monster.
The HD DAC X just sounds right. I never A-B'd it with my PS Audio Direct Stream DAC. It just sounded right. Same was tru with the Aesthetix pre-amp vs the Nagra. The Nagra just sounded great, so there was little impetus to compare. When I finally went back to the Aesthetix, it was worse, as I suspect would be the case with the PS Audio vs the HD DAC X. According to Rene La Flame, NAGRA"S N.A. Distributor, The previous DACs were not in the HD line. Only the HD DAC X is made to their cost no object design.
The HD DAC X just sounds right. I never A-B'd it with my PS Audio Direct Stream DAC. It just sounded right. Same was tru with the Aesthetix pre-amp vs the Nagra. The Nagra just sounded great, so there was little impetus to compare. When I finally went back to the Aesthetix, it was worse, as I suspect would be the case with the PS Audio vs the HD DAC X. According to Rene La Flame, NAGRA"S N.A. Distributor, The previous DACs were not in the HD line. Only the HD DAC X is made to their cost no object design.