Firmware is upgradeable by a dealer that has access to the Bel Canto programming board and software.
For the CD2, I don't think you'd see any benefit replacing the original power supply with the LNS1. Now the VBS1, that's a different story.
For the CD2, I don't think you'd see any benefit replacing the original power supply with the LNS1. Now the VBS1, that's a different story.