So let say I bought the Smith realiser A8, and I use someone else measurements. How do I hook up my headphone? Do I hook up the Realiser to my PC via HDMI? then hook up my headphone to the Realiser?
There is a dedicated Smyth Realiser A16 thread here https://www.head-fi.org/threads/smyth-research-realiser-a16.807459/
The previous A8 thread here: http://www.head-fi.org/t/418401/long-awaited-smyth-svs-realiser-now-available-for-purchase
The Smyth page here http://www.smyth-research.com
Both units have 1/4 headphone jacks and the a16 has usb and toslink outputs as well. But instead buying the a8 without using your own measurements you'd probably be better served by the Mobius or dspeaker headspeaker.