"Worlds best cables" has a shop on amzn with a menu dropdown for xlr and trs, they have that cable in there too. A bit pricey but not outrageous, good warranties.
I have an He6seV2 Adorama ed. here with my 887 and my smsl su9n is incoming. I'm just looking for great sound and have no technical background. In the testing and review of this dac model it is stated that best performance is at max 4.9volt and if your amp can take it then run the su9n at max. So, can my amp take it?
And I guess I should, since people tap speaker amps for the he6, also ask is it enough for these headphones?
Also, some reviews described the 887 as not having a nice feel. I felt just the opposite unboxing it, heavy-ish enough for me and the power button is on a timer so its flimsy touch is understandable.