How does one connect a Sennheiser HD 650 to a CypherLabs Theorem 720 using the balanced plug? I google everywhere and I cannot seem to find cables that do that... Many thanks!

So i made the jump..coming from nowhere (iphone + sony MDR-1R) to a WooAudio WA7 + Sennheiser HD800. I still cannot believe the quality this setup delivers vs what i was used to. The detail of the music, the separation vocals/instruments etc. Wow, i was not expecting so much of an improvement -...