The Trifecta came with balanced and unbalanced cables. The balanced cable sounds less bright but still has an edge to it. I don't hear the brightness with Solaris on either iBasso or iFi players.
The manufacturer suggested trying a pure copper cable to tame the brightness of the Trifecta so I was asking others experience with different cables with the Trifecta.
Thx to ghdprentice about Cardas. Always gratifying when the best solution is also the cheapest.