Room correction with Phantom

[Snoopy8]

Absolutely, this is very much a Dirac thing. The SHD Studio is cheap though, just USD 900. The others you mention are more expensive apart from the RPI with a HAT of course.
However, SHD is the only alternative if one wants to send L only and R only to respective Phantoms without Dialog (i.e. Phantom in Solo mode)

Yes, the X4 and DEQX are more expensive, but have better electronics and arguably better room correction capabilities than Dirac Live. I use Dirac Live for my home theatre and investigated using the SHD Studio for the Phantoms. 

After extensive testing, I decided against using the optical input on the Phantom because I preferred the much larger sound stage using UPnP.  It would have been much easier to use the SHD Studio or X4 via optical.  I took the hard and time consuming route of learning and using REW + rePhase to generate the convolution impulse for MinimServer running on a NUC. It is not for everyone, but the results are very good, maybe close to Dirac Live.

By the way, DOS2 update (removing Dialog) is supposedly next month (fingers crossed many times!), so sending L only and R only will no longer be needed.