To be honest I still believe it's psychoacoustics and gear acquisition syndrome in full action here, I had a friend who is using a DCS Bartok and after auditioning in his home with the new dac compared to my Holospring 2 he is convinced the DCS is completely another level (which in terms of SINAD, it is, just above audibility), but then once I pulled my dac, and a topping E30 to his home, using his streamer but I did a little trick, only the spring 2 is connected to the actual amp, with the display completely switched off, a channel switcher is connected to both the DCS and topping, so that when switched between DCS, topping and unconnected channel 3, the DCS and Topping will show a signal is feeding to them, and guess what, the friend actually heard a great difference and believed the DCS sounded way above the class of the 3 dacs, that was until I showed him both DCS and topping didn't actually connected to the speaker.........