The equipment, which was supplied and installed to the Chorleywood facility by reseller and systems integrator Root6, is connected up to a TerraBlock storage area network.
Parthenon managing director Carl Hall told Broadcast: "To ensure quality I wanted to keep material in its native HD format and XPRI enables us to do just that. Root6 also supplied 6 terabytes of storage - that may seem excessive but when you consider a one-hour wildlife programme may have 90 hours of material for editing, you can see why we need it."
Established in 2002, Parthenon Entertainment has produced more than 500 hours of natural history, science and history programmes and currently has almost 70 hours of HD programming in production.
The first show to be posted on the XPRI will be Hollywood Fox, a 60-minute HD production for National Geographic and NDR, which charts the ongoing struggle between Californian real-estate developers and conservationists seeking to protect the San Joaquin kit fox.