Yes, multiple 640H units can be networked together.
Each 640H makes its content available to all of the others. The user simply needs to tell the 640H the name of the other devices on the network and the 640H will find the available content. The user can also share content on a PC using the share name �Media� and the 640H will also find all of the shared content on the PC. The content is combined by each 640H into its own database so that they all share the same distributed pool of music. AudioFile deliberately does not identify to the user where the content is stored as, for the user, it does not matter, they just want to select the music and play it.
The 640H Hard drive only goes into a soft off when in standby so data can still be read off the drive by another 640H.