Is there a ortho Headphone with the Soundstage size of a Akg 712 cuz its huge, the 400s and i was even worse then a hd650.

Hey i wanna connect the Fiio d03k to ps4 with optical but how i connect the Fiio d03k to a Fiio 09k ?? Line out pre out or coax? Line out i need for my speakers already, and coax sucks cuz have to swith on the d03k from optical to coax everytime when using.._ Or is there a better way cuz can...