To be fair to Ayon, Gerhard explained to me when they released the CD-5s around 1 year ago they did not yet have the 24/192 board ready at that time. In fact it needed a further year of development of their own Windows 7 software for the USB driver. Fwiw I agree with Gerhard's own personal view that USB is not an optimal connection for an audio signal, but of course most current owners will likely want to keep up to date. The CD-5s at it's price point still remains probably the best analogue sounding rbcd player in the world