I’m thinking of buying a pair to use with Roon and just wondering what is a decent affordable endpoint option? Would using it with my iPhone with a lightning cable be suitable? Should I think about adding a DAC such as a Dragonfly?
A DAC would be my first recommendation for getting the best out of Roon. Cipher if you also want to use the El-8 as a portable setup with the iPhone.
The Cipher cable has some limitations as described here when used with Roon.