You know, I have changed my mind on this one after recent research. Apparently the LX has the same headphone amp as the regular Dacport, except -3 gain compared to the Dacport.
So it would mean that it can function as a dac/amp, except the volume control has to be at the OS/software level and you lose some volume.
I know some people would be like "oh no, you can't use software volume, you lose bits and it degrade sound!" However the alternative is worse because the volume pot they use on the Dacport audibly degrade sound vs the LX, so compare theoretical bits vs audible signal degradation I'd say losing that pot is a net gain.
Apparently it can still make the HD650 plenty loud at about 70% volume, so unless you want to use this to directly power planar magnetic/orthos like the HE-500/LCD2/3 - which the original Dacport arguably can't power adequately anyways, then the LX is actually a better dac/amp than the Dacport itself.
Weird huh? Turns out the DAC-only version of the Dacport is a better amp than the Dacport.
Losing the low quality pot also means you don't get channel imbalance when using IEMs, very nice!
If there's another drop on this I might just jump in.