Balanced wiring for Sennhesier 800 S

LavriCables can do it.  I made a mistake about the balanced inputs to the QX-5.  They're 3.5 mm, not 1/4".  So I need two cables with male 3.5 mm plugs at one end and Sennheiser 800S connectors at the other.  The cables should be wrapped together except at the ends.  

I may try the unbalanced cable that comes with the 800S before ordering balanced cables.  Ayre offers 3.5 mm and 1/4" unbalanced inputs.  

I have balanced cables with my Sens......I think someone years ago recommended Cardas.......still have them

Check with ZMFheadphones.  They make to order several grades of cables with a variety of connectors.

I have the 800s. Since everyone strongly suggests using balanced cables, I ordered a set from lavricables. (I think @soix had recommended them).  Their website has many options, and the guys at Lauri were great at answering all my questions. I ended up with silver cables, balanced.  I could not be happier and I highly recommend them.

I've used Forza Audio Works and Norne Cables with great results. Both should have many options for different cable options, termination choices, maybe even colors, so you can find something to fit your budget.