HD Fury i very well aware of this thread and the test you did. About this halo issue, they answered me this :
Hi there
There are no adjustments on the hdfury to overcome this. The hdfury has been tested here
https://tinyurl.com/dactestresultsand comes in as a reference DAC.
Usually halos are caused by cabling that is too long or poorly shielded.
In other word there is no problem, it's your cable...
Hard to accept for a "reference" product that is sold 10 times the price.
So if i resume. HD Fury have this annoying halo effect and Icy Box have sync issue.
If you want a good dac you need to buy the Startech but you need a sync combiner after it because for an obscure reason the composite_sync=1 option doesn't work.
About the Reflex Prism, i assume we are at the second batch. Do you know the price it was sold when it was available last year ?
I see there is a RGB/YCbCr switch which is great. They say "Video levels tuned to spec but also user adjustable" so i assume that even if their dac doesn't test right, there still a way to perfect it. Do you know how to do it ? Is there trimpot in the pcb or some kind of micro controller ?