Just to be clear, 68Pete did a nice job of summarizing (above) the improvements specific to buying a new K-03X vs K-03.
For those looking to upgrade their existing K-03 to "X" it only includes the new USB interface to allow for playback of DSD in native format. The upgrade in the US costs $1,500 which includes shipping back to owner after upgrade is complete.
If you go to the Esoteric USA website there is ample information for both the K-03 upgrade and K-03X. The upgrades are being completed at a facility in CA.
Here is the link for upgrade path:http://www.esoteric-usa.com/USB-upgrade.php
For those looking to upgrade their existing K-03 to "X" it only includes the new USB interface to allow for playback of DSD in native format. The upgrade in the US costs $1,500 which includes shipping back to owner after upgrade is complete.
If you go to the Esoteric USA website there is ample information for both the K-03 upgrade and K-03X. The upgrades are being completed at a facility in CA.
Here is the link for upgrade path:http://www.esoteric-usa.com/USB-upgrade.php