Found this in another thread dated 09/09/2014 ...

Originally Posted by MDS Norway
User Guide for Qnap with Sooloos

Meridian streaming systems can now take advantage of the flexibility and reliability
of a range of QNAP network-attached storage (NAS) systems.
QNAP storage systems that use x86 CPUs are compatible with Meridian systems,
with the addition of QPKG software for QNAP systems provided by Meridian.
In addition, your Meridian streaming system needs to be running software v2.359 or
higher.

These series are supported:
TS-x69L Series ( We use the TS669L in our demo)
TS-x51 Series
TS-x70 Pro Series

All the best

PerS
Seems to suggest that a 451 will work.

Also noticed that the QNAP user guide linked above mentions that "Models using x86 compatible CPUs" are OK. I think that covers most if not all Intel processors.

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